I need friend help fast.. i dont even want to go to school!?

so i have this lunch table. me em bridget katie lauren aly and brittany. I really dont like all of them exept for brittany. Now brittany made some new friends and they are always calling her on 3 way and they invited her to sit at there lunch table today. After a while they invited me to but i think it was just out of pity. But they LOVE her. I dont feel I belong any place, i mean im friends with a lotta other people but there not close friends like someone i would go sit by. im not a nerd but then im not supper popular. i dont know what to do. should i stay with the bitches or go on where im not wanted? I have been crying over it all night because i feel i dont fit any were like to many things are happening at once for me to deal with. should i go to this different school that my brother went to for a year...or do i stay and tough it out. i have been wanting to leave for a while but im scared becAuse its a lot bigger of a school and ill get shy and scared idk y if i go there.