To state the obvious: Breakups and fights with a significant other really blow. Distress within a relationship and the ultimate fight, the breakup, can be extremely painful, confusing, and often leave you with a deepened sense of longing for your partner. Somehow, the turmoil makes us want to be as close to our partner (or ex) as possible. Now, researchers have found out why this happens.

Sitting in a park, a woman sadly faces away from a man

According to a new study from the Norwegian University of Science and Technology and the University of New Mexico, the brain releases oxytocin (that鈥檚 the 鈥渓ove hormone鈥 that makes people want to cuddle after sex, among other things) when someone perceives that their partner is less involved in the relationship than they are and during times of distress in the relationship. While oxytocin is mostly known as a hormone associated with love and bonding, the researchers argue that it鈥檚 also a 鈥渃risis hormone,鈥 according to a study press release.

Researchers examined 75 couples and 148 individuals who are romantically involved and found that oxytocin increased both during times of bonding and in times of relationship instability. In fact, oxytocin release was even more consistent with moments of distress than in times of love and bonding.

Researchers discovered this by observing that partners who were more involved in the relationship released oxytocin when thinking about their significant other, whereas those who were less involved did not.

Study co-author Aarseth Kristoffersen says one reason why this could happen is 鈥渂ecause people in a relationship where their partner is waffling need to engage more鈥 in order to make the relationship work. Co-author Steven Gangestad says, 鈥淲hat鈥檚 implied here is a statement about what oxytocin is doing: It鈥檚 perhaps fostering attention to and motivation to 鈥榯ake care of鈥 the relationship.鈥

These findings suggest there鈥檚 a biological desire to make things work with our partners when they seem checked out, or when the relationship has ended. Whether or not it鈥檚 good or healthy to listen to the instinct to make things work and keep investing in the relationship is another issue altogether. The brain may say 鈥渟tay!鈥 but if the relationship is dysfunctional or unhappy, the tough work of acting in our best interests 鈥 but against what our body is telling us 鈥 begins.

It also stands to reason that this phenomenon contributes to the strong urge to reconcile and make things work during a breakup. If the less-involved person leaves the relationship altogether while their partner is releasing oxytocin because of the distance caused by the breakup, that second person is still driven to be close and pay attention to their partner. And that鈥檚 one of the major emotional pains of breaking up.

The study helps explain what鈥檚 going on when relationships are in distress, and also raises a lot of interesting questions about romantic partnerships. Is it possible to counteract oxytocin鈥檚 effect to make fights and breakups easier? Does oxytocin prompt people to stay in unhealthy relationships longer than they should? There鈥檚 still a lot more research to be done on the subject, but just knowing this phenomenon exists helps us better understand our behavior in relationships.

Do you think the 鈥渃risis hormone鈥 has played a role in one of your relationships? Tell us about it on Twitter @BritandCo.

(Photos via Getty)