Of course he doesn't want to give you and the drinking up...it would upset the lifestyle he has become accustomed to....and yes, he will do those things to get you off your decision...
But the thing is, it is your life and your decision..he doesn't have to agree with you....
any more than you have to agree with his drinking lifestyle...
I always thought I had to have a "good enough reason and rational argument" for my choices about whether I wanted out...and it's not true, it is enough all by it's self that I wanted out. That was good enough.