my cheerleading coach is a b*tch?

[Doll]

at cheerleading practise she tells me that i look huge and like a body builder even though i have anorexia (she doesnt know it). and she just gives me mean looks and sometimes when we perform at places she tell ALL the other people except me about the time and place. like she doesnt want me to come. whenever i ask her something she just give me a short answer like "yeah..., ok, no". i dont get to do ANYTHING and she always places me in the back. she makes me cry myself to sleep i hate her. i dont think there's anything wrong with me. i'm pretty and i'm anorexic for gods sake i cant be that fat. but she makes me feel ugly, worthless, fat, clumsy and all that other stuff. what should i do? :'(