Another failed relationship, why???
According to William Swann's
Self-Verification Theory, people prefer to receive feedback from others that is consistent with their own self-views.
At first glance this seems normal and nothing new.
But if you read the following study, you may realize why some of us despite going through several unsuccessful relationships still continue to hook up with the wrong person.
In this study a group of college men were divided into either a positive self-concept group or a negative self-concept group based on test scores done earlier.
They were then told to interact with a group of prospective partners for about 2-3 hours. Participants were then led to believe that one of the prospective partners have views that were consistent with his self-views while the other prospective partners have views that were inconsistent.
Result 
Participants with positive self-concept preferred and chose partners that view them positively.
Surprising,
Participants with negative self-concept preferred and chose partners that view them negatively.
Although this may not explain the whole story of why some people keep involving in disastrous relationships but it does provide us with a good start. For example, it is so common to hear people complaining ‘Why am I always ended up with guys who are abusive?’ Maybe they should start looking at the problem from a different angle.
Swann, W. B., Jr., Stein-Seroussi, A., & Giesler, R.B. (1992) Why people self-verify. Journal of Personality and Social Psychology, 62, 392 – 401.