[GleeLover514]

So a friend of mine, lets call her Kelly, is pretty much a stick, but she thinks that she's fat. Today, before school, I was sitting with her and a couple of other friends while eating some dry cereal. She said, "That smells really good, but I can't have it because I'm trying to lose weight."
Remembering what she had been saying about being fat, I said, "Kelly, you are eating, right?"
She kind of dodged the question and then the bell rang.
In choir today (Which we have after the lunch periods) I asked her what she had for lunch and she had only had water.
I'm really scared for her health and I really want to help her. I just don't know how to address her about it. I felt like I was being too pushy today and I don't want to come off that way, so how can I go about this the right way? Should I ask her directly is she does? I think that if I do that she'll just dodge the question again.