My coach says this to us ALL THE TIME! It's so true though. It all comes down to your mental strength and your willpower. How bad do you want it? How much are you willing to sacrifice and practice to reach your goal?
It is not cheating. it is a choice decide exactly what you want and eat a single serving in public. It is success when you can forgive yourself for not being pefect instead of binging the rest of the day. There are no forbidden foods.
Here's How To Build Up The Willpower You Need To Lose Weight