<human>: Can you summarize the given text in a few sentences?

We have been together for a year and I know he was a bit of a player in his past. I'm very conservative and 8 years younger so I know he has tons more experience than me. He has told me a bit too much information than I knew to deal with when I asked if he was serious about me. He ended up telling me that he's "sown his wild oats" because he's slept with over 45 women. Only 10 of those were serious girlfriends that he felt "comfortable enough to not use condoms" and he ended up impregnating one who had an abortion.

I am not judging him for all his partners. If I had different views and had the same background he had, I'd probably have slept around too. It's more that I feel terribly insecure now. He was a lot of my firsts and I can't help but wish I was a first at ANYTHING with him. I wonder if he compares me to other girls. I don't want to even think of him not using condoms and being so close to other women the way he is with me, and crazy as it is, I wish he didn't impregnate someone (I know it was an accident) because we talk about having babies together and I obsess about the first baby he made with her.

I know I sound insane and jealous. I've kept my mouth shut about it to him because he's not at fault for anything. It's my insecurity but I don't know how to stop these thoughts. I feel like I'm going to be just another number to him someday :(
<bot>: Insecure after my boyfriend told me about his sexual past and accidental pregnancy with another woman. How do I get past my jealousy?