Girl starts working out excessively to maintain her skinny body and become skinny so that people will like and accept her.
Girl has been working out too much and not having enough to eat, therefore she was low on energy and fainted. her 'friends' were embarrassed so instead of helping her, they just stood back and watched.
A couple of days, after the girl recovers from fainting, her 'friends' come up to her but she tells them to go away and that she has a better and healthier friendship now.
a couple of months later, the girls are sitting together eating, and happily chatting away.