Should I confront this guy or not?

You don't deserve to let him hurt you anymore. Not to make this sound bad, but if he cheated on you, then he never really cared that much about you. You need some one to love and trust, and not some one who cheated on you. I mean, that would probably be stuck n the back in your mind for a long time. It's best to move on and loose all contact with him. He doesn't deserve to get the time of day from you. And you deserve better than that.