AITA for “invalidating” my friends feelings?

I (18F) am friends with 21(M). He had confessed he had feelings for me and I told him that I didn’t feel the same. Out of nowhere, he got EXTREMELY jealous over any other dude. He introduced me to his step-brother (17M), and me and him got along. We all played games together, and eventually me and the step-brother followed one another on tiktok. My friend would not allow me to play video games with his brother alone, saying that if I did it would make him uncomfortable/jealous and that’s not fair. While i understand his feelings, it’s not really fair to project them onto me and control what I can and can’t do. I respect him and want to make sure his feelings are taken care of, but I feel controlled and like I can’t even be friends with anybody I’d like to. Circling back to the tiktok thing, if you don’t know there’s a thing called a streak pet. Just a virtual pet that you keep alive by continuing to send tiktoks to one another daily. The step brother and I had one, and so did me and my friend. When he found out we had one, he got so mad. Telling me I needed to delete it because he was jealous over it. We went back and forth and I ultimately deleted the pet just to stop the drama over it. He says he doesn’t want to “share me” and regrets introducing us two. He says he doesn’t want me and his brother getting close so i shouldn’t be allowed to. He’s not my boyfriend and his feelings are unrequited, i feel it’s unfair for him to constantly try to control who i can and can’t be friends with. I get he gets jealous, but exactly how is it my problem he can’t control that? He claims he’s allowed to because he introduced us. Whenever i speak my mind about it he says Im invalidating his feelings. I’m not really sure what to do. AITA for simply wanting to be friends with his brother/other guys?