He gets jealous of my guy friends as well for eg: when they flirt with me or talk to me privately. He wished me on my birthday recently too with hearts. He says he doesn't care that he has a girlfriend he's still open to getting involved with a girl he's interested in? I don't know what to make of it. He behaves like he's single with me. I've stopped talking to him since that kiss incident.
He's also very sensitive with me like he gets upset over the smallest things when it comes to me. But he's not like that with other people. Like for eg: I didn't sit next to him when I had the option to but I sat behind him and he got upset by that. I don't think that's anything to get upset over. Similarly, when I was leaving once I didn't fist bump him as I did our other friend and he got upset by that too saying in front of us that I forgot on purpose. He keeps making me feel guilty for ignoring him.