I too remember feeling that I was saying good-bye forever to some old friends. But now that I am further out, the honest truth is this.....my old friends are there, but my relationship with them has changed. I realize now they aren't that healthy for me, but I still enjoy them in small doses......kind of like that crazy relative that is a hoot for a short while, but you wouldn't go stay at her house.
I honestly enjoy them less anyhow (sweet things.....salty munchies are still a struggle). The only food I have given up in general, are deep fried foods. I basically don't eat them........but that's grease, not a food item.
I still eat the chicken, or the fish, just cooked in healthier ways. I do still occasionally eat a few fries........but I make sure I eat with other foods and try to make sure the whole order does not belong to me. You will figure out what you like and what you need......and what you want. But please don't feel you will never have or enjoy those things again. I wish you guys an uneventful surgery and speedy recovery. And it's normal to stress and obsess right before your big day!