Emimily has a great idea. This might be kind of drastic and most likely expensive, but you could also report her for drunk driving. Then she will go to jail and they might order some kind of rehab for her. Many state hospitals also have substance abuse programs. Check into that and perhaps you can find a counselor to talk to that could offer you advise on your situation. Have you considered taping your conversations to use as "proof" that she is a threat to herself?
I am not sure what to say to offer help - - so I will end on this note and keep you in my thoughts and prayers.
