Welcome! Buying your alcoholic significant other alcohol or providing rides to get alcohol is the *definition* of enabling.
Offer to drive her to rehab or the doctor and to sit with her through cravings, or leave.
Tell her you both know she is an alcoholic and you will help her get better but are done helping her stay sick. Stick with it.
Google codependency. Get the book Codependent no more. Go to an al anon meeting. Don't worry about what happens to her if she can't get alcohol. That isn't your problem. Only she can choose to get better. She has to want it.
I know this is all very very hard. I'm not belittling it.