Welcome to the SR family.
I'm not sure there's much you can do to help her at this point. She must want to change for herself. The only thing you can really do is let her know you love her and are sorry to see her destroying herself with alcohol.
We also have a friends and family forum where you might find more insight from people who have gone thru the same situation as you.
I'm sorry for the circumstances that brought you here but glad you are here. There's a lot of support here.