My boyfriend is utterly insane?

My boyfriend has absolutely no self control. He does whatever comes to his mind without thinking. He is really violent, sometimes I get scared of him. He never hits me but threatens me, and black mails me to. He always gets his way and is really dominating. But, I like him that way for some reason. But he should have some self control, I have to listen to his every word like he is a father from there 18th century. But, he never listens to me, and gets drunk and hits other men and fights like a stupid guy. Wut is wrong with him, he doesn t have any problems. He is muscular, fit and gorgeous. He uses a lot of foul language and swears for no reason. He is quite smart to.