I TOTALLY understand. I have that addiction too. Whenever I went to a buffet, I ate till I made myself sick. I cannot go to buffets anymore, at all.
Right now I just finished eating a can of soup, I am full, and I STILL want to go in the kitchen and find more to eat. When I am done eating something, I actually feel sad. I look forward to the next time I can eat. I plan for it (to make sure I don't eat too many calories), and then when it's over, I'm depressed. I want to keep on eating!