It sounds as though he's got a serious problem with alcohol, though that in and of itself does not cause someone to become physically abuse toward their partner. Alcohol lowers his inhibitions, so even with therapy to address the unfair behaviour and abuse, he'd have to be prepared to make a serious lifestyle change in order to assure that he can stay calm around you. Your situation sounds dangerous and I'd recommend you seek immediate help for YOU - you're the one who's in danger. If he loves you he'll be willing to make the necessary changes but right now you have to put your self and your health first. I'm sure you love him and I'm sure that when it's good, it's great, but this is a very dangerous situation and right now he needs to sort out many things and he's got to do it for himself. You can be supportive, but only if you're alive and well.