Thank you, everyone, for your replies. Lots of good advice to think about.
Yes, my life is quiet and stable now. I am so grateful that I quit before I had any major consequences, that I am free from that ball and chain (addiction to wine), and I have great plans for the future now.
Since I have avoided her ever since I quit, I believe that I may have broken our enmeshment.
I will try to support her from a distance, as her life is a disaster, in every area, and I do care about her.
I realize that very strong boundaries will be required to do this.