is my friend figure obsessed?

My best friend is really worrying me. i know its good to feel healthy and look nice and fit but i think she is obsessed. She counts teh calories on everything and anything. even if she isnt eating it. she will refuse to eat it if it has like a certain amount of fat in it. She says its a habit to look at the calories and everything but it worrys me that she is so obsessed. She uses under eye cream that helps get rid of dark circle and bags. she is 15 and doesnt bags or dark circles. i asked her why she used it and she said " just incase" She is a vegitarian aswell so eats pretty healthy anyway and has a good figure. but she has stopped eating "crappy foods" like a piece of chocolate or crisps. i got her to eat them for the first time in 4 weeks on sunday. im really worried. do you just think im being silly or do you think she has a problem. please help!