school ppl being mean:(

theres this girl in some of my classes and she hates me:( i have genuanly no clue what i did. she was being rude first then i started being petty back but now ive just let it go and am trying not to get into any drama but she's still being.. rude.. i asked her to stop making a rlly annoying noise and she said no super rudly. then kept doing it