Really? Every session? How is THAT helpful? Have you asked him? Sounds weird to me...
On the other hand, Ana turning to Mia is pretty common- your body fights back to survive. Same goes for the substance addiction- all mimicking eating (i.e. energy supply) and depression (comes with malnutrition) :/
BTW, hate to break it to you but anorexia is NEVER just anorexia- after all it is just a symptom