Being awfully thin is not healthy. It sounds like you have a problem.
Like anything in life, you are the only one that can decide to get better. When you do, I hope that you know where you can get help with your eating disorder. I think most of us will certainly offer whatever support a stranger on the internet can, and we will certainly offer advice on how to find a competent therapist.
But I sure as hell am not going to offer you support or advice on how to get sicker.