I get it.
One of my co-workers that I have close dealings with is a heavy drinker. He knows my situation. Ever since I told him I quit he seems to find a need to talk about it all the time... or maybe since I'm sober I just notice more that that's all he talks about.
Oddly enough, just today I stopped by his office and he told me this morning he was diagnosed with Type II diabetes. We had a great conversation.
I bet, given enough time, there will come a day when your sobriety will become a valued asset to him. I mean, I know there's people that can be more functional than I was while drinking heavily... but drinking heavily is drinking heavily. It's not a matter of 'if' it will bite you somehow, just 'when.'
Best-
B