Justin and Michael and Ethan
Michael and Justin are hanging up posters for Rage when Justin catches the sound of violin music (oddly, Justin runs into him like every episode, yet we don't hear/see Ethan before or after their breakup...where the hell is he?).
Future Fix Moment: Michael and Justin are hanging up posters at a time when B/J are falling apart and very divided. Compare to the season three scene where B/J poster up anti-Stockwell posters, very connected and in it together (I'm reaching on this one, but I think it still works).
Justin dumps Michael to go talk to Ethan.
E: But if you're the one the other two are in love with, you can break both their hearts.
Hmm I don't think he's just talking about the film anymore.
Ethan then kisses Justin, which Michael sees from across the street. Ruh roh. (Really though Justin? You knew Michael was not that far away. Justin is really really terrible at hiding this affair.)