My life T^T

so there are a LOT of mean girls in my class like A WHOLE LOT!!! I feel like they hate me for whatever reason. BUT I DIDNT EVEN DO ANYTHINGF TO THEM!

1. im genuinely nice to them no matter what
2. i have manners unlike them
3. they literally put trash in MY BAG!!
4. the teacher just WONT BELIEVE ME

but hey atleast im NOT getting beaten up ;--;

plsplspls help me by giving me some advice!! i just wanna survive and get this over with :((