You don't get it, do you? MC is not-was not in a relationship with anyone. He can fool around with anyone he wants (tho he shouldn't bitch about it too, that was really bad lol) without consequences (unless he fools around with Arieth, which leads to CrabVille). Unlike MC, they were in a
committed relationship which makes it a lot fucked up. They fixed their drifting away problems with a single talk, they forgave each other cheating under a minute. If MC walks away, they don't wait a single second to make out. Guess how long will it take for them to break up?