Guy's Behavior

Why does he want to know if I slept with other men?

So I’ve liked this guy for awhile now, we’ve known eachother for 2 years and I thought he wanted to be with me because he said all kinds of lies to make me fall for him but 2 weeks later he had a girlfriend. I was fine, kinda sad but I soon realized that he just manipulated me. Anyway we started texting eachother again and hooked up once but this time I didn’t believe his lies about him having feelings for me. He took my virginity and probably thought that would make me fall for him tbh I do like him but I learned my lesson and don’t give in to him, I only talk to him when he reaches out first and I don’t beg for his attention anymore, he was used to me doing that. Lately he messages me a lot and even on vacation he was sending me pictures, texting me a lot and so on. He kept posting random girls in his stories, it felt like he was trying to make me jealous and after 3 weeks of silence between us he contacted me again and wanted to know if I slept with someone else during this time apart. I said no and asked him if he did and he said yes and I was just joking and said „oh you cheated on me“, he was like „I mean I can sleep whoever I want to or not?“ he sounded kinda pissed, he then started posting stories again and I feel like he wants to make me jealous again (he rarely posts anything) After another 3 weeks he texted me again and asked me again if I slept with other guys.. I feel like he wants to tell me something but he’s too stubborn, I don’t want to be delusional but his attitude changed and I have no idea what this is about. Did I just hurt his ego because I’m not chasing him? Or is it that he wants more but doesn’t want to admit it? Thank you guys!

Why does he want to know if I slept with other men?
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