It took me a mintue to figure out the stone thing, but I got it now. I am 7 stone and I am really sick because of how little I weigh.

It doesn't matter what your weight is as long as you are healthy. At 8 stone you are not fat (you already know that).

Why not try exercise to achieve the body look you desire? Believe me skeletal is not attractive. I know because I am there.

Try to eat healthy and be healthy. Exercise and try to eat better foods. You are not an idiot for not purging; its a good decision.

It would be different if you were horribly obese, but this is not a healthy conversation. Don't aspire to be like me. I pass out a couple of times a day from low heart rate. I am not happy. It is hard to stop once you make it habit.