I have a food addiction/:?

I've done the whole nine yards of dieting time and time again,my last diet was over a year ago. I just tried to go on one yesterday morning and it was a failure. I started taking gnc pre cleanser and it was the hardest thing ever not to eat what I wanted to. About 24 hrs later I just caved and ate spaghetti ,cor,tamales enough for 3 people maybe more): what's wrong with me,what can i do?