Tiny Skinny Pre-teen Girls What Should I Say When Someone Says "I Wish I Was As Skinny/tiny As You"?

What should i say when someone says "I wish i was as skinny/tiny as you"? - tiny skinny pre-teen girls

I am very, and I feel very uncomfortable .... idk what I'll say it again what you just smile and say, oh. my bf said that is strange in my family, but I think so. Suggestions?