What do I do when I can’t forget my boyfriends past??

When me and my boyfriend started dating we were very honest and open about our past. I know that I get easily jealous so I didn’t ask to many questions about his sexual history or previous girlfriends, however, he did tell me so much unnecessary and unwanted information that I can’t get out of my head. We have been together for almost a year and it still sticks with me. I never wanted to get curious because I knew it would ruin me, but he burst out things about his sex life and girlfriends that I would have never asked about because I would be upset about it. He told me that him and his ex used to have sex multiple times a week, when they were going through a tough patch before their breakup they only did it a couple times a month. I know that she wanted to cum every time they had sex and that she wanted oral all the time. I would have never asked him for that information but he told me that loud and proud. I know that he’s had sex twice while a girl was on her period, once with me and once with his first girlfriend. I know he hooked up with an engaged woman and slept with her. I know too much about his sex life and girlfriends that I don’t want to know and I don’t know what to do now that it’s stuck with me for the rest of my life. I think about these things multiple times a week, if not multiple times a day. I can’t get this information out of my head and it makes me so frustrated. I never talk about my ex or my sex life unless he asks for it because I don’t want him to know unnecessary things that will just make him overthink etc. I’ve had this issue for months now and he knows nothing about it. I don’t know what to do because it is really bugging me. Everything he has told me has been against my will and I would have never asked him for this information myself because I know how I am. I don’t know what to do at all… please help