Wow. Where to start?
Maybe the same place Alanon would (hopefully WILL) start you.
The three C's
YOU cannot Control, Cure, nor Cause her drinking.
You see those words, but they do not (yet) match your action(s), do they? You keep thinking your "talks" were somehow going to Control something?
You would be better off peeing in the bottle and when she got a taste of that, she may spit it out. But a serious, a dedicated A . . . like it sounds like she is or heading towards, may just drink it anyway.
So now that we hit a little bit about what YOU cannot do . . . let's hit on What YOU can do.
Alanon for you. The Three C's is just the start. Alanon will also teach you to "Detach" (get some safe distance), and how to have "Boundaries," so her Crazy will not come over to you and you can stay out of her Crazy.
You know where, and when, and how about getting to Alanon?