Do i have an eating disorder or am i just being dumb?

Sounds like anorexia. Or an undefined eating disorder. There are some disorder that dont match up to any specific disorder are considered undefined. I think you should get some counseling. Disliking your body to that point isnt healthy in any stretch of the imagination. Not to sound rude. But I do think you have a disorder, and that you are wise to realize that you may have one, and that you do need help. Please get help. Dont let this disorder kill you.