Editing Interpersonal attraction (section)

===Breaking up===
{{Main|Relationship breakup}}
There are several reasons that a relationship, whether friendly or romantic, may come to an end ([[breakup|break up]]). One reason derives from the [[equity theory]]: if a person in the relationship feels that the personal [[cost–benefit analysis|costs]] of being in the relationship outweigh the rewards there is a strong chance that this person will end the relationship.{{Citation needed|date=July 2011}}