Am i becoming anorexic!?:S?

well, okay if i sound stupid and i'm not, please don't say anything mean:L okay, well when i look in the mirror, all i see is someone fat staring back, i feel sick when i look at myself, and so ugly, people say i'm thin, but i'm honestly not, some days i will eat about the 1500 calories, and others, like 200, now i don't want to eat cause once i eat i regret it, and just insult myself, i hate eating infront of skinny people, cause it makes me feel so fat, i've stopped eating for a week, cause i feel guilty when i eat, i don't chose to not eat, i just imagine what i could look like if i was thin, so it stops me from eating, and i will do some exercise so i don't want to eat, is this a sign or is this nothing at all? thankyou :)x