Type2_bp wrote:But it makes me wonder why do i keep fighting to keep him around?
Oh, now this is indeed a profound question.
Some people might say that it's all his fault — he's abusive and has chosen you as a victim and a victim is all you are. Others might say it's all your fault — you're "weak" and you somehow take pleasure in being treated badly. I think neither of these perspectives is constructive. It seems that few people ever consider the more objective perspective: you both have issues. Except you can only do something about your own issues. He's not going to change because of you.
I'd say that in your case, being a victim somehow distracts you from other issues that are painful to deal with. Or maybe the role of a victim feels familiar to you, and this familiarity, by mental association, brings conflicting memories and feelings. Or both things. In any case, staying with him is very unlikely to ever bring you any closure to whatever it is that attracts you to this dysfunctional relationship.