Having dealt with alcoholics in the past, they won't get help unless they want help. Don't let them take you with them. Let her go. Some hit bottom and will seek help, some will just drag everyone they know along with them. Many are good people when they're sober, but get a few drinks in them and they turn into a number of different things; a raging maniac to a sobbing fool, sometimes all of the above and everything in between.