I am sorry you are going through this.
Unfortunately my fiancée was one of those who drank herself to death.
It's been about 5 months ago now. She was hospitalized numerous times and even had a life saving procedure on her liver.
Unfortunately, nothing was enough to convince her.
It has been hard moving on without her and I wish that I had more words of encouragement.
The only suggestion that I wish I had listen more to was that
"Worry does not ease the grief of tomorrow. It only robs today if it's happiness."
Best wishes and take care.