eating disorder

So, my friend realized that i stopped eating in public, became 'skinnier' and that I didn't look or act like myself anymore. apparently she did some research and just came to me and said "You probably have an eating disorder" and i was quite shocked, because this is probably true. Things haven't been going very great since i was forced to come out in school and stuff. so some why it feels like eating is the only thing in my life that i can control. I'm scared that i will lose that control again, but i'm even more scared of people finding out. I don't think the main reason i dont eat is because i don't like my body, i used to be quite happy with it. The reason is more the person in it.