that's a big call from your GP not to mention your principal, how dare he?????? It really irritates me that GP's and the like are quick to blame all problems on being overweight but should be able to see the bigger picture!!!!!!! I know exactly what you mean as I am cycling in a similar situation with my weight.
Weight that has come from my feelings of insecurtity about myself not from over eating, as you say the over eating is a comfort/coping mechanism in depression.
Oh honey, I feel wild on your behalf.
I hate finger pointers if they only did their job and looked at the whole person for their answers and trust in the fact that each individual knows their bodies better than anyone else, OOOOOOOOHHHHHHHHH!!!!!!!!!