According to social exchange theory, even if someone is in a good relationship, he or she would be likely to leave if he or she has a:

It should be based on the worth of the relationship, Although logic would tell us that negative worth means to leave the relationship, and positive worth means to stay in the relationship.

Explanation:

Social exchange theory is a sociological perspective and social-psychological that explains the social stability and change as a procedure of negotiation exchange between two parties.

Social exchange theory says Human relationship are built by the subjective cost and its benefits analysis and the comparison of alternatives.

Social Exchange Theory was given by Thibault and kelly in 1959 which describes the relationship which is based on the terminology of profit (reward) and loss (costs). They believe that partner a; always deduct to the cost and like stress, anxiety, compromises, arguments, etc. and increase the rewards such as love, praise, sex, etc. according to sociologists, relationship work upon a proportional loss and benefits. If someone in a good love but if they want to leave each other then they work on social exchange theory. the relationship cost and benefits. Cost will change over time. If a person found more cost and fewer benefits then they decide to leave each other and move on.