Eating three healthy meals a day, a few snacks and doing moderate exercise, will allow your body to go to it's natural set point. It's important to remember that no food will make you fat, as long as it's eaten in moderation. Stop buying those fashion magazines and diet products, and stop believing all the lies being told to you by the fashion and diet industries. Instead, focus on learning to love and accept yourself. No number on a scale and fitting into a smaller dress size will not make you happy.
Happiness can only come from within.