I'm not too far in this at all, I try my hardest to avoid food when possible but I am not anorexic, I am not addicted to it yet thank God. I'm giving it all up for the joy of the Lord.
Turn back while you still can.
If not for your own well being do it for the people you love. You are an influence to the people around you. Do it for the sake of your siblings never developing an eating disorder, quit hurting yourself with this for the sake of your best friends. If you're "too fat and need to starve yourself" does that mean they are fat and should do the same? Give this up, because you are beautiful and you're worth so much more than this. You can lose weight with out jepordizing your life, your bones, and your sanity. You're just ruining your metabolism anyway. We don't need eating disorders to make us pretty. You can lose all the weight in the world but if you don't find your confidence the weight you lose the bones you see will mean nothing, because it will never be enough.