Were you guys drinking buddies before?... it feels like it might be based on his response. That or he also feels like he drinks too much & your recovery is uncomfortable.
If it is none if the above & he still mocks you then he is an ass so don't even give it a second thought, hehe.
During my last big drunk I managed to embarrass myself at a big company event & clean out the bar with my companies biggest client... unfortunately the owner didnt drink like his friends & I did... pretty embarrassing.
I really like my manager but I feel that my drinking, effects of drinking & second chances are running out. I know he knows if you know what I mean ;-)
Wish you the best :ghug2