Boundaries in Relationships

Boundaries are personal limits that individuals set for themselves to protect their own well-being, values, and sense of self within a relationship. They define what a person is comfortable with. They also define what they will not tolerate.

A boundary is like an invisible line that separates you from others on an emotional, intellectual, and physical level.

They help you communicate what you want and need, what you dislike, and what is acceptable and unacceptable.

A boundary describes what you will do, not what your partner must do. It is self-control, not control of someone else.

Your boundaries are essentially your values: the beliefs, attitudes, and behaviors that are important to you. As such, they dictate the nature of your relationships and how they develop and grow.

To have the relationship you want, you must be clear on your own values. What will you tolerate? What won’t you? How you communicate and behave should reflect those values, which are your boundaries.

Everyone has different boundaries. It’s important to stand firm in what you want and need, but just as important to respect and value the other person’s boundaries.

It’s a fine balance between being assertive and truthful and listening, compromising, and understanding each other.

People have varying boundary types in different contexts. For example, one may have healthy boundaries at work, unhealthy boundaries in romantic relationships, and a mix with family. Boundary appropriateness depends heavily on the setting – what’s fine among friends may not suit a workplace. Boundaries at the beginning of a romantic relationship will be different compared with boundaries after cheating.

Why Are Boundaries Important?

Boundaries are important because they enable two (or more) individuals to love each other and grow together. They allow you to take responsibility for ensuring the health of the relationship and thereby empower you to act.

Love is necessary for a relationship to work. But it is not enough. Boundaries are equally important because you’re clear on where you stand and who’s responsible for what.

This clarity provides a sense of safety and trust and allows you to achieve deeper levels of intimacy.

Unclear boundaries carry a cost even outside conflict. They are linked to feeling lost, stagnant, depressed, anxious, or empty. They can also push people toward unhealthy coping strategies, or into relationships that are themselves harmful.

“When we fail to set boundaries and hold people accountable, we feel used and mistreated. This is why we sometimes attack who they are, which is far more hurtful than addressing a behavior or a choice.”

Brené Brown, The Gifts of Imperfection

Here are some reasons boundaries are important for relationships:

• Safety: Both partners can feel safe in the relationship because there are clear guidelines or standards.
• Ownership: Each partner owns the good and the bad.
• Responsibility: You take responsibility for your attitudes, behaviors, and feelings, and expect your partner to take responsibility for theirs.
• Honest Truths: Maintaining boundaries can mean sharing painful truths (e.g., “If you don’t get help for your addiction, I will leave.”). These allow you, them, and the relationship to grow.
• Support: Partners support each other through an overwhelming burden (e.g., being fired from their job), but each partner is responsible for their own life.
• Codependency: Boundaries protect you from codependency because you each own your stuff.
• Risks Without Them: Lack of boundaries can lead to addiction, irresponsibility, immaturity, control, and abuse, which are all damaging to a relationship.

An Example to Show Why Boundaries Are Important

Harry and Grace have been in a relationship for over a year. One night, Grace decides to look through Harry’s phone and finds he has been speaking to his ex-girlfriend.

She becomes very angry and accuses him of lying. Harry gets angry because he feels Grace has breached his privacy by going through his phone.

Both feel their trust has been broken and their boundaries have been crossed. They blame each other and aren’t taking responsibility. 

Growth needs ownership. If they want their relationship to grow, both partners must take responsibility. Grace must take responsibility for going through Harry’s phone (disrespecting his privacy) and her angry reaction. Harry must take responsibility for speaking to his ex-girlfriend without considering how this would make Grace feel.

Ownership changes things. Harry would see Grace’s perspective, then stop communicating with his ex or explain why it’s important to him.

Grace would own up to the fact that going through someone’s phone is a breach of privacy. She would agree to stop. She might accept that Harry wants to stay in communication with his ex and allow him this freedom. Or she might decide it doesn’t work for her.

In that case, the communication shouldn’t be “You cannot speak to your ex” because this is the other person’s responsibility.

Instead, Grace could say, “If you continue to contact her, I will move out.” This is enforceable because it’s about Grace. She is setting a boundary with the only person she can control: herself.

From this example, we can see that boundaries are important because they:

• Show what’s okay and what’s not okay.
• Provide a sense of safety.
• Empower partners to take responsibility and make their own decisions.
• Allow growth to happen.

Types of Boundaries

Within any relationship, each person involved should establish and respect various types of boundaries.

Here are the types of boundaries with questions that will help you figure out what yours are in each category. It’s also a good idea to think about how you will deal with these boundaries being crossed.

Physical Boundaries

Physical boundaries are limits and guidelines relating to your body and physical space.

• What level of touch are you comfortable with? E.g., “I don’t like being hugged” or “I like it when you hold my hand.”

• Who is allowed to touch you? E.g., “Only my family and partner can touch me.”
• Are there certain foods or drinks you don’t want to consume? E.g., “I don’t eat meat” or “I don’t drink alcohol.”
• How would you like your physical space to be respected? E.g., “Don’t wake me up while I’m sleeping” or “When we argue, I prefer you to stand further away from me.”
• What will you do if your physical boundaries have been crossed?

Emotional Boundaries

Emotional boundaries are limits and guidelines relating to sharing and dealing with emotions.

• What are you comfortable sharing? E.g., “I prefer not to speak about my childhood.”
• If you do share something, how do you want their emotions to be treated? E.g., “It’s really important to me that I feel listened to when I share things about my life.”
• How do you best deal with overwhelming emotions? E.g., “I need a moment to calm down before I can speak to you about this.”
• How can they help you to express your emotions more freely? E.g., “It’s easier for me to talk about emotional stuff when we sit next to each other or go for a walk.”
• What will you do if your emotional boundaries have been crossed?

Sexual Boundaries

Sexual boundaries are standards and limits relating to your sexuality and sex life, including consent, sexual acts, communication, safety, etc.

• Are you comfortable speaking about your sexual preference/orientation? E.g., “My sexual orientation is private.”
• What kind of sexual acts are you comfortable with? E.g., “I don’t want to have sex outside.”
• Do you have any sexual trauma history, and how can they be respectful of that? E.g., “I experienced sexual trauma; therefore, I need time to get to know someone before we get physical.”
• What kind of contraception do you insist on? 
• How do you communicate about consent?
• What will you do if your sexual boundaries have been crossed?

Material Boundaries

Material boundaries are limits and guidelines relating to your possessions, like your clothes, house, car, etc.

• Are you comfortable sharing your clothes, materials, etc. with others? E.g., “My home is your home.” 
• What are you comfortable sharing? What not? E.g., “I love it when other people wear my clothes – you can borrow whatever you want as long as you give it back” or “I prefer if people don’t touch the radio in my car.”
• How can you communicate that to others?
• Can you afford to share?
• What will you do if your material boundaries have been crossed?

Intellectual Boundaries

Intellectual boundaries relate to how ideas and thoughts are shared and treated.

• What makes me feel disrespected when sharing ideas and thoughts? E.g., “When you interrupt me while I’m explaining myself, I feel disrespected.” 
• How will you show others that you respect their thoughts and ideas? 
• What will you do if your intellectual boundaries have been crossed? 

Time Boundaries

Time boundaries are limits and guidelines relating to how people spend their time and what their time is worth.

• How much alone time do you need each day or week? E.g., “When I come home from work, I like to have 15 minutes just to myself.”
• What are your priorities? How can they respect these?
• Are you/they late often? How will you improve your time management or deal with their constant lateness?
• What will you do if your time boundaries have been crossed?

Healthy Boundaries

Healthy boundaries clearly and consistently communicate to others how you want to be treated and loved (and how you don’t). Unhealthy boundaries are inconsistent, loose, too rigid, or nonexistent.

Healthy boundaries come from a place of love and wanting to grow. You’re assertive about what you want and need but simultaneously compromise and adapt to the other person’s boundaries.

As psychotherapist Esther Perel explains, everyone “straddles” two sets of needs from birth (Perel, n.d.). On one side are security, stability, and safety. On the other are freedom, exploration, and discovery.

Perel suggests romantic relationships are where people try to reconcile the two. So boundaries are negotiated over time, not set once.

Here are some examples of healthy relationship boundaries:

• Values own opinions (doesn’t compromise personal values or beliefs due to pressure from others)
• Shares personal information appropriately (careful not to over or under-share private details)
• Accepts when others say “no” (without retaliation or manipulation)
• Respects others’ privacy and personal space

Many people believe they are being selfish when they communicate and implement their boundaries. Some people use boundaries for selfish reasons and to control their partner.

However, there’s nothing selfish about letting people know how to love and treat you. You’re just honest about who you are.

Boundaries are not about control. They are also not a way to fix another person to suit your needs. They are about knowing what you want and need. Then you communicate it truthfully.

When you respect another person’s boundaries, you pave the way for them to respect and value yours. When you set appropriate boundaries, you can feel safe without needing to control your partner.

Unhealthy Boundaries

Many people struggle to set and maintain boundaries. Your early experiences of relationships determine your ability to stand firm in what you believe in, what you want and don’t want, and what you will tolerate and what not.

So if your upbringing was unboundaried or overly strict, you might struggle with boundaries in your adult relationships.

Here are some signs that you need to work on your boundaries:

It could be that your boundaries are too loose or non-existent:

• Do you have difficulty saying no?
• Are you oversharing personal information?
• Do you feel unable to make decisions without the input of others?
• Do other people take advantage of you?
• Is expressing your needs, wants, and opinions difficult and anxiety-provoking?
• Do you fear being rejected if you don’t comply with others?
• Are you overly involved with other people’s problems?
• Do you feel like you’re constantly trying to fix, help, or rescue others? 

It could also be that your boundaries are too rigid:

• Are you fiercely independent and don’t want anyone getting close?
• Do you find asking for help very difficult?
• Do you avoid emotional intimacy?
• Have others told you that you seem withdrawn or detached?
• Do you tend to want to control others?

If you’ve answered yes to the questions above, you probably struggle with boundaries to some extent. But don’t worry: setting and maintaining boundaries is something you can learn over time.

Examples of Healthy and Unhealthy Boundaries

Here are some examples to illustrate the difference between healthy and unhealthy boundaries:

Trespassing

For example, you want to try a particular activity, but your partner does not.

If your boundaries are healthy, you respect their decision and don’t ask again. If your boundaries are unhealthy, you will sulk, shout, or keep nagging until they give in.

Enabling

Let’s say your partner constantly overspends and asks to borrow money but rarely pays it back.

Allowing this to happen repeatedly means your boundaries are not in place. You’re tolerating behavior you don’t like.

Having healthy boundaries means supporting your partner in overcoming their spending issues while expecting them to take responsibility.

Therefore, you might say, “I love you, but I’m not lending you money again. You will have to get a job because I can’t sustain us both.”

Each partner is responsible for their own life. You can help each other, but you should not enable or rescue them – healthy boundaries mean you’re putting limits on each other’s destructive behaviors and attitudes.

Dependence

Let’s say Tina is unhappy in life and her partner Ben feels like he can’t give her the life she wants. But no matter what he does, she is still unhappy.

Their boundaries are unclear. There is an element of dependence: Tina relies on Ben to make her happy, and Ben thinks it’s his responsibility to do so.

Healthy boundaries would mean Tina takes responsibility for her own happiness and doesn’t rely on her partner to make her happy.

Ben would support her by listening and suggesting she seek help but wouldn’t feel like it’s up to him to make her happy. They each own their feelings and actions. They support each other.

Control

Jim expects his partner to do everything he says, keeps tabs on her whereabouts, and chooses what she wears because “those are my boundaries”.

This is an example of someone disguising controlling behavior as boundaries.

Boundaries mean freedom. You choose to love the other the way they are. You’re truthful about who you are and give your partner the choice to love you as you are.

Control is not respecting the other person’s freedom. You want your partner to make the decisions that suit you, you don’t accept it when they say no, and you punish a “wrong” choice.

Using guilt or anger, withholding love, and constantly trespassing boundaries are manipulation tactics aimed at control, and are a sure way to destroy trust and love.

Sometimes, people use control because they don’t know how to communicate their needs.

Ultimatums

When our boundaries have been crossed, we often give the other person an ultimatum: either you do this, or you suffer the consequences.

When setting boundaries, individuals take responsibility for their own choices and reactions, seeking to address them in a healthy manner.

Ultimatums often place blame and the onus for change on the other person, without the ultimatum-giver acknowledging their role in the situation.

Sometimes, ultimatums are necessary. This is the case when the relationship lacks a strong foundation of boundaries and respectful behavior, or when repeated attempts to communicate your boundaries have failed.

However, ultimatums often lead to resentment and distrust, ultimately hurting a relationship.

Rules

Relationship boundaries and rules are not the same thing, although they may seem similar at first glance.

A boundary is a limit you set for yourself to protect your own well-being, values, and sense of self.

Examples of boundaries might include:

• “I need some alone time each week to recharge and take care of myself.”
• “I am not comfortable with my partner going through my phone or personal belongings without my permission.”

Rules are often imposed by one partner onto the other and are designed to control or modify behavior. They are typically associated with consequences or punishments if not followed.

Rules can be seen as a way to exert power over another person, rather than focusing on one’s own needs and well-being. Examples of rules might include:

• “You are not allowed to spend time with your friends without me present.”
• “You must always answer my calls or texts within 30 minutes, or else.”

Boundaries, when communicated assertively and respectfully, can strengthen a relationship by fostering trust, understanding, and mutual respect. Rules, however, can often lead to resentment, power struggles, and a sense of being controlled or manipulated.

Boundaries vs Expectations

Boundaries are the standards by which you allow yourself to be treated, while expectations are what you think others should do to suit your needs.

Expectations are the things you feel others “should” do. They are based on your upbringing, desires, and personality. For example, “I expect my partner always to be available when I need emotional support.”

These expectations aren’t necessarily unreasonable. But expecting things of other people can lead to disappointment and anger, which is then directed at the person who didn’t meet them.

So rather than expecting the other person to meet your standards, you’re taking responsibility for your standards and don’t accept anything less. You have an expectation of yourself rather than the other person.

Why People Struggle With Boundaries

Researchers explain boundary difficulties in several ways. Some look at early relationships, others at family structure, privacy rules, or learned communication skills.

Attachment Theory

Attachment theory locates boundary problems in early relationships rather than in a missing skill. The difficulty is a learned pattern, not a lack of technique.

In childhood, you build an internal working model. This is a mental template for how relationships work and whether others will respond to your needs (Bowlby, 1969/1982).

Someone who struggles to say no may be replaying an anxious attachment strategy. They over-accommodate, afraid a limit will cost them the relationship.

Someone who avoids closeness may be enacting an avoidant strategy instead. For them, emotional distance feels like safety.

The two ideas are not rivals. In one study of couples, better-differentiated partners also reported lower anxious and avoidant attachment (Rodríguez-González et al., 2023).

That suggests attachment and family systems describe overlapping territory.

Family Systems Theory

Family systems theory shifts the focus from the individual to the family. Boundary problems are patterns the whole family maintains.

Murray Bowen (1978) named the key skill differentiation of self. It means staying emotionally connected to others while still thinking, feeling, and deciding for yourself.

Salvador Minuchin (1974) coined the term enmeshment. In an enmeshed family, boundaries are so diffuse that members become entangled in one another’s emotions, decisions, and identities.

These ideas explain familiar patterns as features of the family’s structure, not personal weakness. A parent who cannot let an adult child struggle is one example. A partner who cannot tolerate a night apart is another.

Differentiation also predicts codependency. Lampis et al. (2017) found that differentiation of self predicted codependent behavior more strongly than relationship satisfaction did. The study was correlational, so it shows a link, not a cause.

Communication Privacy Management

Communication Privacy Management theory treats boundaries as shared rules about private information (Petronio, 2002). It comes from communication studies, not clinical psychology.

On this view, the material, intellectual, and emotional boundaries described earlier are different kinds of private information. Each has its own rules about who owns it and who may access it.

A crossed boundary is what Petronio calls boundary turbulence. It is a broken rule, not proof that someone simply lacks boundaries. Sharing something told in confidence is one example.

The theory fits questions about phones and social media well, such as who may read your messages or see your posts. Harry and Grace’s argument over a phone is a clear example.

The question shifts from “Does this person have boundaries?” to “Which privacy rule was broken?”

Assertiveness Training

Assertiveness training treats boundary-setting as a learnable skill. It teaches people to state their needs, opinions, and limits directly, without suppressing them or overriding someone else’s (Alberti & Emmons, 1970).

The approach fell out of favor in clinical psychology.

Speed, Goldstein, and Goldfried (2018) reviewed decades of mostly older evidence and argued it deserves a comeback. They showed that unassertiveness runs through social anxiety, depression, eating disorders, and relationship distress.

Rehearsing exactly what you will say when a limit is crossed, they argued, targets a shared mechanism rather than acting as generic self-help.

This view competes with the others. Attachment and family systems predict that boundary difficulties ease only as the underlying template or family structure changes. Assertiveness training predicts that structured practice can be enough on its own.

How Strong Is the Evidence?

Few studies test setting a boundary directly. Most advice on phrasing a limit or giving an ultimatum comes from clinical and coaching practice. The research tests nearby ideas, such as differentiation of self and assertiveness.

Culture matters too. The idea that a clearly separate self is the healthy goal comes from individualist, Western thinking.

Rodríguez-González et al. (2023) followed 958 people from couples in Spain and the U.S. Higher differentiation went with better relationship quality in both countries. But the links to relationship stability and avoidant attachment were clearer for U.S. couples.

Boundary advice can also carry risk. Lohmann et al. (2023) pooled data from 45 observational studies and linked coercive control moderately to post-traumatic stress disorder and depression.

If a partner monitors, isolates, or intimidates you, stating a limit and following through can provoke escalation. Seek specialist support first.

Finally, the theories disagree about where boundary difficulties begin. Attachment, family systems, and skills training each suggest a different place to intervene, and no study has tested them against each other directly.

References

Alberti, R. E., & Emmons, M. L. (1970). Your perfect right: A guide to assertive behavior. Impact Publishers.

Bowen, M. (1978). Family therapy in clinical practice. Jason Aronson.

Bowlby, J. (1969/1982). Attachment and loss: Vol. 1. Attachment. Basic Books.

Lampis, J., Cataudella, S., Busonera, A., & Skowron, E. A. (2017). The role of differentiation of self and dyadic adjustment in predicting codependency. Contemporary Family Therapy, 39(1), 62–72. https://doi.org/10.1007/s10591-017-9403-4

Lohmann, S., Cowlishaw, S., Ney, L., O’Donnell, M., & Felmingham, K. (2023). The trauma and mental health impacts of coercive control: A systematic review and meta-analysis. Trauma, Violence, & Abuse, 25(1), 630–647. https://doi.org/10.1177/15248380231162972

Minuchin, S. (1974). Families and family therapy. Harvard University Press.

Perel, E. (n.d.). The paradox of security vs. freedom [Video]. YouTube. https://www.youtube.com/watch?v=G2SuN9BXBxs

Petronio, S. (2002). Boundaries of privacy: Dialectics of disclosure. State University of New York Press.

Rodríguez-González, M., Bell, C. A., Pereyra, S. B., Martínez-Díaz, M. P., Schweer-Collins, M., & Bean, R. A. (2023). Differentiation of self and relationship attachment, quality, and stability: A path analysis of dyadic and longitudinal data from Spanish and U.S. couples. PLOS ONE, 18(3), Article e0282482. https://doi.org/10.1371/journal.pone.0282482

Speed, B. C., Goldstein, B. L., & Goldfried, M. R. (2018). Assertiveness training: A forgotten evidence-based treatment. Clinical Psychology: Science and Practice, 25(1), Article e12216. https://doi.org/10.1111/cpsp.12216