Relationship Possessiveness: Why do girls become possessive as soon as they are in a relationship? Understand the science behind it.
- bySherya
- 10 Aug, 2026
Relationship Possessiveness: Love, oxytocin hormone, emotional attachment, and past experiences can play a big role in being possessive about your partner in a relationship.

Possessiveness in a relationship
Relationship Possessiveness: After entering into a relationship, it's often seen that partners begin to feel more possessive about each other than before. This feeling isn't limited to girls; boys also feel the same way about their partners, but it's often more obvious and apparent in girls.
This isn't due to any weakness, but rather to hormonal changes in the brain and emotional attachment. When someone is deeply involved in a relationship, their brain accepts that person as an essential part of their life. Let's explore the science behind this.
Oxytocin hormone creates deep attachment
The biggest reason behind being possessive in a relationship is a hormone called oxytocin, also known as the "love hormone." This hormone specifically increases trust and affection in relationships. This is why even small things like hugging or holding hands feel so special. When this hormone is produced in the body, the attachment to the partner deepens, and the brain becomes more vigilant in trying to protect the relationship. This vigilance causes a person to notice even the smallest things about their partner, and they become afraid of losing them. This fear later takes the form of possessiveness.
Emotional investment and past experience are also the reasons.
Another major reason for possessiveness is the emotional investment made in a relationship. When a person invests their time, trust, and emotions in a relationship, they naturally become more protective of that relationship. Furthermore, if someone has experienced betrayal or heartbreak in a previous relationship, they may bring that feeling of insecurity into a new relationship, further increasing possessiveness. Social upbringing and the things they observe around them also influence this feeling. While mild possessiveness reflects love and care in a relationship, when this feeling becomes excessive and takes the form of suspicion, it can become detrimental to the relationship.




