Thank you very much ^_^ although I've been eating much more this year
If your friend is not mean then probably she was passing a general remark, or she meant that it is not good to remain hungry (in the general sense). She must not have meant that you are stupid as in low IQ. Also, there is a possibility that she wants you to start eating so that you do not suffer from the side effects of anorexia. Anyways, please clear this with her so that this does not affect your relationship. Also, if you have anorexia, please try and consult a therapist dealing with eating disorders. Take care!
The medical advice given should not be considered a substitute for medical care provided by a doctor who can examine you. The advice may not be completely correct for you as the doctor cannot examine you and does not know your complete medical history. Hence this reply to your post should only be considered as a guiding line and you must consult your doctor at the earliest for your medical problem.