This “friend” used to try to embarrass me in front of other people, and would criticise my appearance to try and humiliate me. She does it to a lot of different people as well. I’ve figured it’s jealousy. However, once when she criticised me and I defended myself/said the same thing back to her but nicer, and she looked incredibly offended and upset. I wasn’t even mean to her I just defended myself/gave her a taste of her own medicine. So why is she so insensitive towards other people but so sensitive when it comes to herself?