Hopeyred,
My daughter just had a similar experience with her ABF. They had rented an apartment together and he was going off the rails with his drinking.
In my daughter's situation, she was able to get him out and keep the apartment. She tells me how thankful she was to get out of that relationship. She had gone so far as to have him move into the spare room and just do the "roommate" thing, trying to be "compassionate" and sympathetic to him. His drinking didn't get better and it affected his job and soon would hers. She said she had a split-second vision of what life would be like living with him as they argued over "why" his drinking was a problem, she was certain that wasn't the future she wanted. Sending hugs and positive mojo your way to figure it out. YOU control your destiny. Seize it and live.