Has he had a drink since?
If he has, no question, out the door!
Any physical violence is absolutely unacceptable.
You will not find anyone here to minimize that.
If he has been incredibly apologetic, and has not drank and has decided on his own never to drink again, this may be worked out.
I have my worries about you being a bit naive to what you are dealing with.
Please read the "stickies" (permanent posts) on the friends and families sections.
Sorry you got assaulted, and hope you heal, inside and outside.
He needs to be seriously watching his Ps and Qs!