I'm okay with cheating?

So my boyfriend may have cheated on me. Everyone's talking about it and saying that I look dumb for staying w him

I still don't know the truth but a lot of people including those who were there think that he did

I asked him about it twice and he stuck to his story, didn't budge and some stories add up to his

I asked again and he told me we won't work if I dont trust him and he's not sure if he's ready for another relationship if this is how it's gonna be

Anyway I agreed to forget about it and I haven't felt super sad or anything about it and I don't know why?

I was at first but .. did he manipulate me out of my feelings by mentioning a possible breakup ?

Am I really afraid to lose him?

Should I be angry?

I don't get it

Update:

This shit haunts me on a day to day basis. I've fallen harder for this guy but every time we get closer all I can think of is him with her and I don't even know if it happened or not. This is the worst feeling ever. How can I get over this ?