Is this girl anorexic?

There is a girl who sometimes sits next to me in class and i was looking at her wedding photos on facebook I notice that in one photo - you can see very obvious indentations on her chest and it looks like she starves herself - the indentations on her chest are extremely obvious - when I see her at school - she usually covers up her chest with clothes so you can't see the bones underneath but in her wedding dress her the bones in her chest was very obvious. I think she may have struggled with and possibly still continues to struggle with aneroxia at some point in her life. One of the reasons I used to think she was pretty was because she was very thin but after learning that she might be aneroxic - I will never ever compliment her on her thin body.
Is this girl anorexic?
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