such eating disorder is called Anorexia Nervosa, when one does not eat to starvation. See, at this point you should try to find out her fields of interest. she seems to be not lively at this point. and that is why she refuses to eat. When she will get lively or start doing what she actually likes and loves, then she will feel appetite, her hunger pangs will get alive. And she will start eating. do u get me? Try this. it will help.