Hell Raee and welcome to PC. You are in a very tough position. As you said, your bf is in a tougher one. He is enabling his mother's behavior. Does he agree that she has a problem? If so, I would suggest that he check out a support group for family members of alcoholics to learn how he can love and support her without enabling her.

I will admit my opinion is biased. But your bf may end up having a dozen gfs or wives during his lifetime, but he will only ever have one mother. It is however a vicious circle. She will not get help as long as there are people around her to pick up the pieces. Loved ones feel the need to pick up the pieces. Everyone one of us comes with baggage. Is this baggage you can deal with? It does not sound like it.