Well we already know he's a lightweight, and he also must be aware of it himself, so he probably doesn't drink much. If he does it's in the comfort of his home and by god he's miserable. Not "screaming crying throwing up" kind of miserable, but more "dear god i wish i was dead" kind of miserable. Tho these thoughts are never coherent and he can't control himself enough to even pick up a knife so most of the time he just falls asleep on the hard cold floor and wakes up the next day sore all over