Being outside. Gaming or watching television is a temporary reprieve. Force yourself to bring up something to do with a friend or two, even if it's just to meet for lunch. Force yourself to strike up a conversation with someone beside you in class, even if it's just to ask something about lecture. It doesn't feel social but it's social enough and your brain will feel a little better for it.

Have you noticed how I keep saying "force yourself?" It's because nothing ever falls into your lap - you have to take action and do something yourself to alleviate what's hurting you, in this case loneliness. And left untreated, feelings of loneliness will spiral into depression... caveat: I'm only being an armchair therapist here

Lastly, I don't know what you mean by "ableism" but if your disability isn't physical move around more. Go to the gym, go hiking (better do it quick though, rain season is at our doorstep), play a sport.

Or you can give advice that even you don't fully follow yourself to random strangers on Reddit :) I'm feeling a little better myself right now