Brightlight -
He may drink every day until the day he dies. It is possible.
Would you rather spend the rest of your life trying to get him to stop or spend the rest of your life finding happiness for yourself, whether he continues to drink or not? How about today? Would you rather spend today trying to get him to stop or spend today finding some happiness?
I think that you're realizing that you don't have any control over his drinking. It doesn't matter what you say or do - he is only going to stop if he decides to stop. It's his choice. You have a lot of choices of your own. I found much more peace when I started concentrating on my own choices and leaving his choices to him.
Hugs - L