CONGRATULATIONS! You have just made a major step in admitting you have a problem and then, that you want help for it. As scarey as it will be, I agree, you need to tell your parents, actually say those words to them. They already suspect anyway and before long, they will know when a crisis comes up due to your condition.. They will love you no matter what and will be there to support and help you, cheering you on, backing you 100%.

If you are young like I think you are, nip this in the bud before you do damage to your body that will effect you the rest of your life. You CAN overcome this, just believe in yourself and that you are worth the effort.... because you ARE!