Thinking heavily of that one episode of MAS*H where Hawkeye gives up booze for a spate of time. Hell, I already have the key line(s)[1]:

"Damnit, I've gone as long as I possibly can, I need this!"
[INSERT NARRATIVE BEAT]
(realising) "...but I'm the only one who does."

[1] Key line: the piece of narrative or dialogue that's the keystone of the scene.