Stuck in Indecision

I can’t tell if I’m running from a relationship that I should save or if I’m escaping a destructive relationship. I don’t know how to tell. He’s been drinking heavily over the last year, passing out, being mean. Signs were there before, but I ignored them or thought they meant something else. Things hit a breaking point and I said I couldn’t be around him for two weeks. He says he will never drink again. That he didn’t realize the pattern, but I had voiced my concerns many times. I don’t know what to do. Part of me believes him, part of me doesn’t, part of me doesn’t want to try anymore, part of me feels hopeful. I don’t know how to make the decision.