Originally Posted by
Nightingale77 
And if I leave, there will be no one else to hold him accountable or keep him from drinking himself to death. Basically, I feel like I'm in a "damned if you do, and damned if you don't" situation.
Unless you've taken on divine powers you won't keep him from drinking himself to death if you stay. You're giving yourself a lot of power in your mind as his 'saviour'. You will do this by 'holding him accountable'.
It's absolutely true that As only recover by holding
themselves accountable. I wrestled with drinking for years, and as a single person there was no-body telling me I had to quit or holding me accountable. Finally my internal feelings about myself gave me the motivation to stop.
He does sound like a good guy because he's telling you his alcoholism is stopping him from taking your relationship to the next level. You better believe he's not seeking treatment or intending to stop. As heartbreaking as it is, step away.