I'm not an expert, but all the reading I have done so far mentions that when there is physical violence or addiction you need to protect yourself. Get out. Get help, or if you must stay only do so if he accepts to attend appropriate therapy and on the condition that he will NEVER be violent again. Not even once.
I'm sorry I don't remember more details, it was not relevant to me so I didn't pay that much attention and only remember it because it is one of the points that most professionals agree on.
"There's nothing sadder than a conman conning himself"
“There is freedom waiting for you, On the breezes of the sky, And you ask "What if I fall?" Oh but my darling, What if you fly?”
