JC feels absurdly calm when he says "You have absolutely no intention of breaking up with her, do you?"
Justin looks shocked, hurt, but JC knows Justin's body language almost better than his own. The tiny head dip and small tentative smile are classic, and JC turns away, almost sickened.
"I can't do this anymore, J." And he knows it's the right thing to do, thinks he shouldn't have even started something that couldn't have ended any other way.
It still surprises him when Justin nods and walks out the door without another word. The door clicks shut too quietly.