I don't know what to do. 🤷🏾‍♀️

So I had sex with this guy, now granted I haven't had sex for like 2 years! I don't know why it was that long but that's how long it's been for me. So when I met this guy I straight up told him that I don't want a relationship and that I just want to have sex with him. (I know that's kind of messed up but I would rather be honest and up front then to be sneaky about it.) He was down for it. But then he asked, " if you want o fwb then are we exclusive?" (Meaning that he only mess with me and I only mess with him.) But I told no as long as we BOTH are protecting ourselves then it's fine. If you want to talk to other people. He said okay. So after we hooked up, a couple of days later we're trying to figure out how when would be a good time to hook up again and he stops me and says "Hey before we get into more of this I just want to let you know that I'm hooking up with this girl that hit me up" And I said okay. And he was like how do you feel about that? And I was like "it's fine as long you protect yourself." Now why would he tell me that he's hooking up with this girl? I mean I appreciate the honesty but I feel as though I don't really need to know that. And why ask me how I feel about it? But I'm thinking about cutting him off but I alittle bad. He asked me if I get regularly tested and I told him that I haven't been with anyone for TWO YEARS! And I was the first for my ex. So im clean! And so I asked him if he got regularly tested and he said he does and so I asked him how many partners has he been with and he said over ten and I asked why so many (not that it was a problem.) Just out of curiosity. And his response was "it's because I'm insecure" Now I didn't know if he was joking or what Soo just kind of laughed it off. And I was like okay. But I'm just trying to end it with him and I'm not sure how to go about it. Tell me if you guys think I'm being to harsh on him. Or I should give a chance. Or if I should just stop talking to him.