1. I love the feeling of being healthy
You do don't you? Even though you forget this sometimes, it is true. Now get to remembering this.
2. I'm not thin to be thin...
I'm thin so that I can feel healthy and confident. I'm thin so that I can feel attractive and comfortable. Being thin is a means to an end. The end is the feelings you want to regularly have.
3. Fattening foods taste good, but
being thin and healthy is considerably more pleasurable. No seriously, stop for a second and think about how enjoyable it would be to wake up in the exact body that you want.