I too am a carboholic. I did follow the pre-op diet faithfully and somehow made it through that okay. Oblivious during that time, I now know that it was a way to rid my body of the bad carbs. Now, I never touch the stuff. I'm afraid that 1 little taste will send me down the tube. I know that I have an addictive personality. Right now I'm struggling with a cheese obsession. I was on a tic-tac cycle a while back, but have gotten that one under control.
If you can stay off the bad carbs, you will be better off. Believe it, you won't feel tired, crabby (most of the time, lol), and you'll have much more energy. This is not to say, that you still wont go through the "mourning" food stage. I went through that after about a month post-op - was depressed, angry, moody, etc. Remember, your body and mind is addicted to food. It's the same as giving up liquor or drugs, you have to go through the withdrawal period.
I wish you all the best. Hang in there, it does get better! Brenda