I have mixed feelings about this. No way the guy is this fucking dumb. He already knows she's not good with crowds yet still decided to leave her with it. He knows she's treating him as a friend but continuously pushes her away.
Trauma? Being "fat" and "ugly" is traumatic? Ok, sure. I might hate that one girl for saying that to me, but I would never treat other girls the same way I'll treat that girl. If someone who's like me, genuinely seems like they want to be friends with me, I have no reason to push them away or give distance that they'll feel isolated.
It's disrespectful to the other person's efforts to befriend me.