T I would try to be pretend to be amiable in classes if I had to chat something up in a forced situation, so I could at least say some words about the current schoolwork, and maybe it helped that it was a stem major and we mostly were all nerd spectrum, but there was no friend-like relations after the classes were over nor did I hang around with students for hangout sessions in hallways, classrooms etc. before or after classes. And fortunately, most all of them were cool about it and left me alone. And I recall I wasn't the only one that wasn't sociable. Not saying this is for everyone and it may be harder for loner girls. I was just there to finish the major while often depressed but determined to go through it, and not really caring about a social life or getting laid or a gf then.
Ok I did not get far in college, so I am not an expert. As far as bullying, i think in high school it reaches it's peak in general. i would say high school bullies seem to have endless time to find ways to humiliate people and will keep it up for months or years. In college, I would say even if they are just as big pr*cks, most of those same kids will mature to the point that they at least will just mostly mind their own business or get bored with the idea of terrorizing victims in some way. It isn't even that they matured exactly, just more that they are somewhat older and are bored with the idea of showing superiority. I didn't like most people as in 98% or more, in any club or sports team or school or activity anyway, so me being excluded in a way was doing me a favor.
A problem I had was if someone talked to me in a class where there was a lull and it was deathly quiet, I would give some generic answer due to anxiety and now the whole damn class heard my generic answer so they thought i was boring. If I could only have dealt with people one-on-one i would have been so much better off. Who knows what the hell all the students even talk about in the hallways or in between class. It is the same idea of being at a bar and every conversation you hear is more interesting than the one you are having. There is really nothing to be jealous about in not being included in some dopey conversation. When I was dating, even women I was with or that went successful, i was almost horrified at how boring I must have sounded, and i would say a lot of the same BS with each person I dated. I have no idea how every one of them wasn't bored to tears. My point is, feeling left out of conversations in a workplace or school or college is dumb, because basically all those conversations are relatively pointless and run-of-the-mill anyway.
I would guess from a male point of view, in junior high school, you would say to your friend, "wow did you see her boobs," and in college, I think it is basically the same level of immature thinking, just a slightly less juvenile statement or comment. Men seem to never mature anyway, at least when it comes to sex talk or gossip or whatever. A guy could have a master's degree and have traveled the world and is a CEO but could still tell dirty sex jokes with his friends for hours every weekend, men never mature