Wow, that is an awful thing to say to anybody! It's definitely hard to just let go on these sorts of comments, especially when you are self conscious about your body image.
I think you're a very kind person for doing things with her because she gets lonely! If I had someone like that in my life, I don't think I'd be able to stick the awful attitude they have. She sounds extremely spiteful and childish. I would try and let what she said not get to you and just tell yourself that you are working at your weight and won't let people who say those comments get you down.
Remember, you are beautiful no matter what other people think!
