How do you know if someone is anorexic?

Anonymous
This girl is very skinny, but not ugly skinny. The thing is that she makes comments like she needs to lose weight, but there's nothing to lose. She has no fat at all. I know she has a very strict diet and never has bad food.

This is healthy but she seems to go too far. No bread even.

The reason I am asking is becuase I think she is taking diet pills, which would be nuts.

Is she a little crazy or am I weird? I would compare her body to a models. Very very skinny, but not sick looking. She could probably use a few extra pounds.

I am really into her but am a little worried. She would still be very beautiful with 20 to 30 more pounds.

So when does being healthy cross the line?
How do you know if someone is anorexic?
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