Hi im new to this but well ... ill explain

um so im 15 and i think i have anorexia because i dont eat because i think im really overweight despite everyone telling me i am not. I haven't told my parents and to them at home i am 'fine', i have to swallow the food and it makes me disgusted with myself and then i go nd cry after every meal at the weekend. AT school however, i don't eat but my friends are really concerned but i just snap at them and tell them to leave my body to me. I hate being mean to my friends but they just dont understand.
I cant go and see someone about it bc then my parents would find out and i just recently to them got out of a depressive episode ( which i didn't really but they dont know) i need help, what should i do?