Surgery date set

Hello, I have my surgery date set 1/13. I am getting a bit worried. Will I never be able to eat certain foods again? I have no problem with everything in small amounts. I have been reading where people cannot eat some items at all. This is for the rest of my life. Getting cold feet. I have lost about 20 lbs since September on my own and am still losing just by eating healthy. But sometimes when I get a craving I will eat only a bite and that will do the job for me. I guess never is too strong of a word for me. Any words of advice out in lap band world? Linda