Hi, Navyblue.
Welcome to SR.
I think one of the hardest things is to accept that the person in front of us is an addict, and they are not going to change, no matter what we do.
Your mom has shown you over and over again that her priorities are drinking, partying with her boyfriend, then recovering from the first two things.
Doesn’t seem to be much room left for anyone else.
Were I you, I would consider myself done. No more chances because nothing will change unless your mom becomes sober.
It’s hard, I know.
My family situation is mother and alcohol addicted brother have the classic co-dependent relationship, where his needs come before her own and everyone else’s.
Maddening and saddening at the same time.
Good luck and good thoughts.