5 years and...

I feel like my fiance is a stranger to me. i recently found out something about his past that has changed the way i see him. I care about him and i want to be with him but im having a hard time getting past this information at the moment. I have talked to him but we have different views. He doesn't see how its hurting me right now. He thinks i dont care about him because i haven't wanted to be intimate with him for the past few days. I dont know wut to do