Relationships

How do I deal with my boyfriend’s sexual history and his sleeping with someone after we met? I don’t want to dwell on this?

Hey! I apologize for the long message but I think it’s important.
I started dating a guy who I met at the beginning of second semester of this last school year. He and I were going out (not officially) for awhile. I liked him and wanted to be with him but realized I wasn’t ready for a relationship. We talked and decided it would be best for us to be friends because I wasn’t ready and he didn’t want me to feel pressure to be. We were still interested in each other but I was able to work on myself.
Eventually we had another conversation that was more definite because I was still in a weird place and didn’t want to drag him along. It broke my heart to let him go but it was best for both of us.
Fast forward a month, we started going out again. Things were great; I’d worked though some stuff that was holding me back (like an abusive ex) and we started dating. We’ve been together a month and a half and are very happy.

We’ve had different upbringings and this has shaped the way we each view sex. I haven’t had sex yet and it’s something that I have wanted to wait to do with the right person. It holds a lot of value to me (maybe even too much because of religion). He doesn’t see it as as big of a deal though it’s more rewarding with someone you are in a relationship with and better to do that way. I’ve come to peace with the rest of his past, however the one thing that has been eating away at me is that he starting talking with a girl during that month we weren’t really and slept with her. He’s said that he thought that I didn’t think there was any possibility of us being together and if he’d thought there was a chance, he wouldn’t have talked to her at all.
How can I get past this? It has been really bothering me and I don’t know what to do. If it is because of my insecurities, how do I overcome them? I love him and don’t want to strain the relationship. He said we could as much as I need but I don’t want to bring it up more. I would appreciate any advice I can get.
How do I deal with my boyfriend’s sexual history and his sleeping with someone after we met? I don’t want to dwell on this?
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