7st on someone 5'6 is a BMI of 15.8

(8st is 18.1) To be diagnosed as anorexic you'd have to have a BMI of under 18, and it's perfectly possible to
die of malnutrition or electrolyte abnormalities with a BMI of 16 or more. I can't possibly describe how fucking idiotic this is. Crystal is different - she doesn't have to diet to we the weight she is. If you do, then I really think there's something wrong. From what I've seen of you you look pretty skinny at your current weight - if you lost another 3 stone you would be ill.