First off, you can't use leaving him as a means to make him stop drinking. He has to stop because he wants to, not because he may lose something. He has to hit "HIS" bottom. You need to remember that his booze and where his next drink is coming from is most important to him, not you, not anything. Stop threatening with leaving.
If you feel leaving is the right thing to do to protect yourself from his violence, then do it for YOU, but in the long run it won't mean diddly to him. Your feelings mean nothing to him as long as he is an active alcoholic. I think him telling you how great he felt while not drinking was for your benefit only.
You need to do what is right for you, not for him. Doing what you did rarely works with an alcoholic.
He needs to get into AA or some sort of program to help him never to drink again. If he worked a program of some sort, he would have a better chance.
And YOU, need to also work Al Anon or some sort of program and get yourself well. Your relationship, at this point, is toxic.