I have to agree with Velveteen and Apple cheeks... You've known this girl for awhile now...so you know what kind of person she is. Is she usually like in most cases, not just about weight/food? I don't really know her but I have a feeling that she didn't really mean to make you girls feel like you are bigger or fatter. I think she just doesn't have enough self-esteem and self-confidence just like a lot of us.
For example, I'm 204lbs right now...and I could say "why is SHE trying to lose weight?!?!" to members who weigh 150 lbs. But for those members who do weigh 150lbs, they may feel like they are very heavy...
If it makes you uncomfortable, why not try to talk to her something about it? I think it'd be better to get that out of the way than keep thinking about it and end up not wanting to hang out with her again...

