Ok. It happend in my school. I had a friend wich self esteem was very low . Once I said her that she need to eat because she didn't eat at all. She didn't like that. She looked at me with a piercing gaze and said that she prefered to be thin than with cheeks like mine. I was shocked. I thought we were the best friends and we cared about each other. But she didn't think so. She said bad things behind my back.