Eating disorders?

So my friend had been wanting to gain weight for quite some time and she did try but she has a problem with appetite, recently it’s gotten worse and she’s lost so much weight she doesn’t look good. And she’s now started telling me she can’t imagine ever gaining weight and she likes how skinny she is and so on, is she just trying to convince herself now that her eating habits are normal because she’s failed to have a normal eating plan and gain weight, she keeps saying she wants a bbl but God forbid she gains weight? I really don’t get it.
Eating disorders?
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