I feel like most ppl my age (college) seem to be so mean and self centered. Why do people make fun of others even at this age? I thought college students were more accepting of others but it doesn’t seem like that

I’m in a class with a majority (basically all) people a grade younger than me because I messed up my schedule. it will be like this next year too, because the class that i’m in next year my grade already took this past year. I messed up , and now my friends ask me about it and treat me like younger than them and like below them kind of. and they’re not bad friends, but it is embarrassing bec what i did is just not normal. i’ve tried to keep it on the dl from people because they judge. I know i’m probably overthinking it but i’m scared my friends are gonna leave me because all they talk about is the class that they’re in that i’m not in and leave me because I’m behind. it’s really stupid that i’m not really a part of my own grade anymore, and it ruined my school years that i am currently in (at least that’s what it feels like). basically im scared that i’m going to be lonely the rest of these years and sad and it’s all because of a choice I made, even though i hope they wouldn’t do that.:(

i’m so stressed about college. i’m SO worried about meeting people, talking to people, making friends, meeting my roommates, etc. i’m scared that they won’t like me. i’m scared that i’ll say/do something that i couldn’t control and then they all hate me. i’ve been so on edge with my ocd lately, and it’s not very out of the ordinary to have me wanna do something like. weird. but it’s also just like…anything can happen. that little “your chances may be low, but they’re never zero” is always in the back of my head and it stresses me OUT. “the chances of you doing some weird and crazy thing or something out of pocket to your new roommates are very low, but never zero” like that TERRIFIES me dude. idk what to do. on top of it, im scared that they might accidentally do something and contaminate me or my surroundings or anything and then there’s nothing i can do about it. im always VERY particular with keeping things clean, with who can touch them, etc etc, but what if they do something behind my back? or what if they don’t but i think that they did and im stuck instead my head for the next like day or so? i’m so scared. i dont know what to do. does anybody have any college experiences they can share to help me?

It seems every chance someone has to upset me they take it. It is like people don't pike me for some reason. I think I'm pretty good at being polite and holding my temper so I don't know what it is about me that they don't like. Why do they want to pushme?