I'm a little older than you guys (no longer a 20-something anymore) but I can totally relate to being absolutely addicted to food. Especially high carb, high fat junk!!
I saw a book recommended on here called 'the Beck Diet Solution' and it's really, really helping me see that a lot of my weight problem and diet problems can be helped with changing my core beliefs/thoughts about dieting. It's a really awesome book- I recommend checking it out.