That's a tough way to feel. You might want to give that some thought. Maybe you're making an unwarranted assumption. Then again, maybe there's something about your personality or attitude that could use a bit of refurbishing. If you really believe they came to dislike you, you must have some idea what brought that on. How do you even know that they do dislike you? Either something happened, and you had to have been there when it did. Or were you just tending to go in different directions from this group, due to different interests.

It's not true that, after one semester of college, students have formed permanent groups with no openness to admit anyone new. That you think that makes you sound like there is something in your attitude that could stand an adjustment.

I'm sorry you are going though something this hurtful. Don't give up trying to connect. There should be counseling available at student health. Go talk to someone. Maybe that could help you figure out how you are coming across that is this big a turn off to others.