Is it normal for a guy to act passive aggressively after a rejection?

Anonymous

A few weeks ago, we got a new roommate for our flatshare and we instantly got along really well. I always thought that there were flirty vibes as well what proved me right our roommates left one night and we ended up cuddling after goofing around, holding hands and he almost kissed me - but I decided to not let it him bc he was drunk and it didn't feel right to do that. I'm also only going to be here for a few more months and didn't want to make it complicated or awkward for everyone involved. He immediatly left the room, but said everything was fine. But since that, I can't read him anymore.

In the following days, he started to proclaim to me and the others that he was seeing various girls as if he wanted me to get jealous and also, began to act very sensitive over anything I said. Granted, there was one misunderstanding that I wanted to clear up, but he left the room before I could apologize or anything. Afterwards, in a group chat, he also misunderstood something I said and texted something really passive aggressive back. I decided to confront him when I got back home, but he brushed me off. When I caught him alone another time, he did it again. Total stonewalling.

And now, he's sometimes nice and then again, just doesn't talk to me at all when I'm in the room or leaves it. Also acts extra loud when he's alone in the living room with our other roommates, what makes it just the more obvious. Plus, he now started to act around our other female roommate the same way he did around me.

I don't know what to do right now. I start to feel more uncomfortable and unwelcome with each day, don't wanna leave my room. And also, I get more pissed. I don't know what's going on with him or how to deal with this, but since I've offered him multiple times to resolve things and he declined, I feel like I should just ignore him back and grit my teeth.

Or would this be the wrong reaction? Is this all over me rejecting him? Should I even bother with someone like that anymore?

Updates
8 mo
Forgot to add: He's also only 20.
Updates
8 mo
Small clarification bc I feel like my reason for rejecting him wasn't clear to everyone: My motive for the rejection wasn't because I suddenly changed my mind about him, but because he was DRUNK. And clearly going for more than a kiss, too. If he would've been sober and sound of mind, I definitely would've went with it. But I didn't want to make living with each other weird because he regretted doing something while drunk. Drunk people can't consent, after all.
Is it normal for a guy to act passive aggressively after a rejection?
7 Opinion