Just started college and i'm so fucking terrified/paranoid about people not liking me; Please help

Hello everybody. I just started college as a freshman a few days ago and I'm starting to get super paranoid and anxious about people not liking me, and just pretending to tolerate me. I'm an 18 year old female, and I've been diagnosed with GAD and "pure O" OCD. I met a few people the second day that I got along with, including this guy (let's call him John) that I started to mess around with a bit too. As of right now I'm so fucking stressed about these people actually not wanting me around and I'll explain why I feel this way--please tell me if I have a reason to be worried or not.

I just started seeing John (we only hung out romantically once two days ago, and I ended up sleeping over in his dorm that night) and I'm worried that he doesn't want to see me again but it's so hard to tell. He's on the shyer/nervous side, so I've been initiating everything mostly. I'm really attracted to him, not just physically, but on an emotional level too which makes this really stressful. After we messed around (we didn't have sex) he hasn't texted me or anything, I've been messaging him first (but not often, I've only texted him once within the last day or so.) Yesterday we made casual plans in person to hang out last night, but when I texted him that evening to ask him to come by he didn't respond for at least 4 hours (it was too late by that point) and he apologized saying he didn't receive my text until right then. I told him it was okay, and that we would have other opportunities to hang out, but he never responded to that either which makes me anxious. I'm skeptical as to whether or not he really only "just received" the text 4 hours later because during that time I posted something on my snap story and he saw it before telling me that, so how is that possible? Maybe I'm over thinking this.

And just now today I texted his roommate (who I also get along well with, he's how I met John) asking if I could get dinner with him and John, and he told me he was busy and that John already had dinner. I'm concerned because John has my number but he hasn't made any attempts to see/contact me, and I was kinda hoping he'd ask me to get dinner with him (now I'm probably gonna eat alone.)

It's so confusing because just yesterday in person John and I ate dinner and his body language was super touchy with me and it seemed like he was still into me, so what's going on? Does he not like me anymore? Or does he just want some time away from me for a bit? I probably sound really irrational but it's so hard to think straight when I have an anxiety disorder--something that's not a big deal always feels like the end of the world to me. It could be possible that John's phone really didn't notify him of my text messages, but he seemed to respond pretty speedily to texts I sent him a few days ago, so it's weird that all of a sudden it's not working. I don't know, I really need some advice, thanks everyone.