wtf do i do?

so there's this guy(mutual friends) that ik that's really pissing me off, it started when i was fighting with his friend and he went and told everyone i was fat, so now this guy keeps calling me fat for some reason, i didn't start it either, so idk why he's beefing with me. normally it wouldn't be an issue and i would just ignore them but its literally constant(like every day on this gc but i can't leave it and i can't take him off it) the worst part is that he's so ugly like i swear my retina was reflecting the light back out my eyes cause i don't wanna look at him and he used to have a crush on me djcNlasCNASKJNXLjjj (sorry i was just revising for biology)