If he were to cheat on me, I’d be okay with it if it were out of lust, loneliness. If it were out of love, or simply that he liked the girl more than myself and was showing her true affection, than I would I be pissed he cheated on me. In that case, I would hope he’d break up with me to give himself a real chance with her. I would hate to get in the way of something beautiful. That’s also why I would stay with him if he were to cheat only out of petty desire.