Forgive him but move on..Have you not tried with all the disrespect he has shown you..If he wanted you to stay in his house, why hasnt he man up do at least introduction and trad wedding..he is using that excuse of you not wanting to stay to cheat on you..Just let him go and Please dont tell his parents anything that transpired, its between you and him infact let them ask him what happened..Just use wisdom in handling this thing..And please pray as well