I don't know if you really want my thoughts on this, considering that I've had my own set of eating issues in the past

. We could be here a LONG time.
I think there is a higher incidence of eating disorders in Diabetic females. I'm pretty sure about that. And I think the reason for it might be b/c there is a lot of focus on what you eat and nutrition when managing this disease. I think it could be pretty easy to slip from a normal attitude about food to something not so healthy. Not to mention that there's the whole concept of control. A lot of people think Eating Disorders really are about control. I could see how a diabetic girl could lapse into an ED- perhaps they are looking for some aspect to control, especially since the diabetes aspect is so difficult.
As Deus and Liz said, it really can be a problematic situation. Not only does it make Diabetes more difficult to manage, but it can stir up a whole mess of other health problems as well.
I don't think I eat completely normally now, but compared to how I have eaten in the past, I have definitely improved. I hope that things become a little easier for you- keep fighting!