I am glad that you have found this wonderful site. Keep reading and posting.
I left my alcoholic...he was the love of my life, but I knew that if I stayed I would eventually lose my mind trying to understand, and being lied to about things I absolutely knew were untrue. I left for my own sanity, and to find a saner life, and I did.
Ultimately, you deserve a good life, we all do, and he will either find sobriety or not. Words mean nothing...actions are everything...long-term, sustained positive action.
Based on what you have shared, if you keep him in your life, you will have lots of heartache to come.