Ik can't believe this.... Your ex has hia feelings and it is his right to have them. Just aknowledge this You have cheated on him and you never told him. How can he trust you? How can he be certain that you never did it again? You van blame everyone you want, but this is on you... And deep onside you know it. That is why you posted it on here... So that everyone knew your side of the story amd they wouldn't blame you that much. But you know.. your (ex) boyfriends are valid. No matter what anybody else says. If you don't want to loose him, you have to fight for him. Aknowledge your bad behavior and your reasons, but aknowledge his pain and what you are going to do to prove you belong together and you are building towards a future of trust and condidence. Don't hassle him with what he did wrong, that is not fair. Look at what is fixable, and if isn't, then it isn't... If it is: go for it and make IT work together. You sound like a beautiful couple, who met at a (too) early age.. i wish you the best