Erin is your boyfriend and he was a good guy, he was empathetic, showed chivalry, but recently has stopped. He doesn’t make plans with you as much anymore, but refuses to tell you why.

When you’re walking down the hall, a different but quicker route to class, you see Erin pressing another girl against the wall, making out with her. You don’t see her face until they pull away for a pause, and you see it was your friend from middle school.