Yeah, school life can be hard Akisa, but here's something about the rude part that quite often most people don't realize. In this life, people will always be rude, that's just a fact. There will always be someone who says something stupid or mean. You just gotta let it be and realize those people don't matter, what they say doesn't matter. Not unless they threaten you or others, in which case call them out and just tell them to screw off.
All while I agree with
>>2 that you don't neccesarrily need friends, most people want someone they can talk to, hang out with, and just plain relate to. I'm sure there are some kids at your school who also like anime, maybe there's even an anime club or something along those lines? Just try to get out there and look for those people who have more in common with you and will understand how ya feel.
There's also plenty of nice people on here you can make friends with, the community here can be crude but for the most part it's decent people.
Just remember, the world isn't as bad as you think.