I think if Garak and Julian did get together during the show they would be one of those annoying couples who are constantly breaking up and getting together and you just want to shake them and scream "Either shit or get off the toilet!"
Julian breaks up with Garak because Garak is 20 years older than him and Julian is going through a quarter-life crisis. He dates a 20-year-old doing a gap year for a few episodes.
Garak breaks up with Julian because Julian left wet towels on the floor and now his place smells like mildew. He did consider just assassinating Julian, but breaking up is the smarter if not the most satisfying path.
Julian breaks up with Garak because Garak doesn't like his friends (Miles)
Garak breaks up with Julian because Julian doesn't respect his culture (subjugating others for the good of the State)
Julian breaks up with Garak not because Garak has a secret file on him but because he thinks it's kind of hot that Garak has a secret file on him and he's supposed to be an enlightened Federation citizen with normal fetishes, like being into feet.
Garak doesn't actually break up with Julian, but does fake his death for like 3 days after Julian says "I love you" for the first time.














