my fiancé likes men...

I just found out my fiancé likes men. We had been fighting recently and he asked what would make me stay with him, so I told him I want all of the truth about when he cheated on me in the past and he agreed. I asked about the women and then I asked about the man I thought he talked to, but he had had a great alibi for-a woman lied and said it was actually her number and told me everything they talked about and that it was her. He told me that the man was lying because they went to high school together and that he was cruel to him, so he wanted to lie. I didn’t truly believe that ever, but never pressed it until now. He admitted to me that he had a dating app and had selected he was interested in both men and women and that he was just curious. He said sexually explicit things to this guy and exchanged images, but never met up(which I believe... I saw the messages and the man confirmed and said he wasn’t interested in him because he only talked about wanting sexual favors). My man told me that he was only curious and that he knows he’s not interested in men now, that he would never look for a man if he wasn’t with me and was single. Okay, sure, that’s fine but that doesn’t mean you aren’t interested in both genders. I tried to make it clear that I wouldn’t care, that I just want honesty but he insists he isn’t interested in men and that it was only curiosity. I can’t grasp that. It’s either you’re straight or you’re not. I’m interested in men and women and I’ve always been honest. Now I understand why he may have been cheating back then because of how he was feeling towards men, not that it makes it okay but I think he was going through a lot. I just can’t help but feel like he really does like both genders and still won’t accept it or be honest with himself/me. I think we need therapy for this to work, which he would agree to, but it sucks that we can’t come to a solution together without help.

Edit: he cheated a long time ago and I chose to move forward.. our fighting recently had nothing to do with cheating. We have just been fighting a lot about different things and I told him we should just go our separate ways and he asked what would make me stay and really try to work on our relationship so I took this as an opportunity to ask about the past again. This was the result. I chose to forgive him for cheating and move past everything so I’m not going to back out of that decision when I made it long ago. I just wanted some clarity and now I’m confused.

Also, we have a two month old together so that makes leaving harder. I love him. I am just really confused now. It took a lot for him to even admit what happened with the guy. He was so afraid I would look at him different or whatever even though I didn’t care. I think he is or was very confused.