I dont know what to do !?

You are JUST like me.... My bestfriend and hungout allll the time.. im the mature one and she goofs off ALL the time. Even at walmart, she flung herself to the ground and started kicking and screaming ----> the reason? because she wanted attention... yea, we are 16/17. now like you, i wouldnt say anything i would just get mad on the inside... well as time passed, she started getting really rude, saying things that she KNEW would upset me... and then she wouldnt talk to me unless she wanted something. idk how old you are but no matter how old you are, its never good to be stepped on, made fun of or hurt, even when the other people are just messing around. it took me FOREVER to teach myself this.. but you just have to be strong and standup for yourself. im not saying stop talking to them, but for now, talk to other people in your classes and get to know them, get to know other people. and when it gets to the point when you have more new friends, start sitting with them at lunch, and in no time, you wont have to worry about being treated like that.... <3 i hope this helps you..... let me know how it goes!!