I feel like I'm this dumb fat girl that no one likes, and everything is my fault. Are these normal teenage girl feelings?

Everyone around me is much smarter and flaunts it. Everyone around me is skinny, and here I am trying to throw up so I'm not fat. Everything I do is wrong, and I can't seem to do anything right! No one else at school seems to feel the way I do! Is this normal teenage girls feelings? I don't think these feelings are normal.