creepy guy at uni

So, like four months ago I got a confession from this person I really didn't like ngl and I basically said that I wasn't interested in pursuing a relationship right now because saying "I don't like you" is kind of mean right? I said it's ok to be friends and stuff.

I was very clear that I'm not interested in a relationship and I've denied all of his advances. The most we really do is talk sometimes and by sometimes I mean maybe once or twice a week and the last time I talked to him was a month ago. For context to add here, I'm a pretty lonely person, we only see each other in lectures and I don't have any friends or anything so no one is ever really around me, I just sit there and daydream between classes (I'm in uni).

The reason why I sort of stopped talking to him a month ago is because he suddenly turned around and went "hug?" with arms outstretched and all. I have some umm other problems and let's just say that now when I see him, I get really nauseous and feel sick. So, I just sort of slowly distanced myself...? Because I can't really explain it to him nor do I really want to, because I can't really say "hey so because you asked for a hug randomly, seeing you makes me feel sick.". And I never really was that close to him in the first place either.

Well, recently, he sent me a message going like "you look stressed, it's probably because I like you" which is close ig, and then he said he talked about it with this other girl. That other girl screwed me over so bad last semester, like I would be up at night and crying because of her (it's a long story), and like he told me that she told him to just leave me alone. And there are some other messages, but idk it's just feels so creepy to me and I don't know if it's the other thing or if it's something about the messages. I don't really care honestly either.

these are his original messages:

"I had the feeling that you were avoiding me because I still like you and that was making you uncomfortable. I asked ____ about it and she told me to leave you alone for now. that's why I haven't been sitting next to you
you're not going to respond to this but I hope you're doing ok you look stressed"

The issue with me is that I'm insanely paranoid, and I don't know if I'm hallucinating nonsense, but I can list like umm three ways the messages are trying to force me to respond. But that might be me being paranoid, and not normal way of thought. I don't really have anyone to ask so I'm asking here.

I don't know, should I just ignore him? I don't really want to deal with this... but I feel like ignoring him is kind of rude. I don't know, I just don't really want to have anything to do with this and I never asked for him to like me and idk I don't even want to go to class sometimes because he sits in the same row as me and sometimes comes up close to talk and I just want to throw up. Sometimes I fall asleep in class and he'll tap me to wake me up and idk what to say like please don't touch me? Why are you touching me.

and if someone goes "ask on reddit or something" he's terminally online. I actually cannot post on reddit there's an abnormally high chance he sees.