I can't really give any parenting advice or anything, but I was the inverse case of yours. I was the raging alcoholic early twenties son of a loving mother.
I hated it when she suggested maybe I go to rehab, I got angry when she asked if I was "drinking again" or if I should go to AA. Despite all that, even in my worst drunken, hungover, or withdrawal state, despite me cussing her out about my problem, I still had a soft spot for her, it's my mom after all.
With time, that "soft spot" got a little bigger and I like to think I'm turning myself into the man she's proud to claim as her son.
Wishing you all the best.