M15 struggling with self love

I’m a freshman and this one group of people constantly make fun of me, I know I shouldn’t give them my attention but it’s hard to do that when I think what they say about me is true. I constantly fear going to school so it’s hard to have fun at my home, is there any way for me to begin to feel better, they always insult my appearance as well, when I look in the mirror I can see what they are talking about. I need help.