I felt EVERYTHING you are feeling now prior to my surgery! I even told my surgeon how scared I was and he said, "That's completely normal. I would be more concerned about you if you weren't a little scared!"

He reassured me and told me not to worry--that I can be scared, but not worried. He said being worried was his job and he wasn't so there was nothing to worry about (I just love my surgeon, lol)!
WLS is definitely not "the easy way" to go. It IS tough, but it is so worth it! Yes, eating habits have to change, and that has been difficult for me, but you learn and adjust. I went through a phase for a couple weeks before surgery where I wanted to eat everything because "I won't be able to have this again." Now I keep telling myself that I CAN have it again--maybe not today, but at some point I WILL be able to have it again.
Best of luck to you!