Hello there. I am sorry to hear about what your fiancé did to you. I can only suspect he had been doing it for a long time and finally got caught. Unfortunately, he showed no remorse, instead he turned the blame on you. Only later does he say he is sorry, but I think the damage is done. Pulling him out of that relationship and towards a relationship with you is not your responsibility. His behavior is likely to continue, only next time he will try to hide it better. The trust has been broken between the two of you. I honestly think that you cut ties with him. The more you try to help him the more you get frustrated. And, don't you want him to seek after you? You can't have a relationship with someone who is always looking outside of the relationship for fulfillment. Cut ties and move on. Better to find out now then when you are married.