Really annoyed with my best friend calling me anorexic?

I had the same problem. I had a stomach problem that made me go, well, #2 a lot, and my best friend accused me of being bulemic because I'd spend a lot of time in the bathroom. Just tell her you are naturally thin and have a good metabolism and obviously you're not anorexic. She is OBVIOUSLY jealous of you, and probably not even worth being friends with if she is going to keep putting you down. Tell her that you are happy she is concerned that you have a problem but 1. that is NOT the way to go about dealing with it and 2. you DONT have a problem! My boyfriend is the same way- he is extremely tall and skinny and hardly ever works out yet eats 2x what I do and we are close to the same weight (And I am average weight, on the tall side as well!)