To add onto what Mark said (which I also agree with 100%), is it possible you have a fear of intimacy, commitment, or abandonment or some combination of the three?  A fear of intimacy, especially, can be sneaky. Even if you’re the type who would love to have someone close to you and have a close, intimate, safe relationship, you can still be afraid of it for the possibility of pain that comes with that type of relationship if you break up. Usually a fear of abandonment comes with a fear of intimacy.  If you date emotionally unavailable men, it provides a protective barrier because they never get tooooo close.