Addicted to sweets - just found out i'm pre diabetic. Help?

You could try to limit your chances of getting sweets so you won't be tempted. If you are then tell yourself why you started the diet, what would happen if it fails, all the good things if you succeed, and that eating even a little or one would ruin the diet. After breaking the diet even once would only tempt you to do it again. Good Luck!