We're often our own worst enemies. When I did my minor in Psychology in university, we learned about the 'Self-Fulfilling Prophecy' -- 'a prediction that, in being made, actually causes itself to become true' (Wikipedia.) If you tell yourself that you're a hideous fat beast, you will start to believe it, and you'll lose confidence in yourself. So you have to find a way to reverse this thinking, as difficult as that might sound to people.

The Diet Blog suggests this: For every negative thought you have about yourself, think a positive thought. And instead and emphasizing what you dislike about your body, talk about what you like. I know it seems like it's impossible that something so small would have a difference on your weight but it will, by boosting your self confidence.