Is it normal i hate all my classmates

I'm not sure what seems to be the problem with me, I'm an introvert most of the time, I can be shy but I do speak my mind. My classmates in university seem to dislike me and they mock me, exclude me, say nasty things about me when I try to be nice with them, help out and do my best in projects.
I don't know what's the matter but I want out, I feel I'm too old to be bullied and there's no reason why this should happen.
Any suggestions? Has anyone here experiences something similar?