I was where you are last June, after starting in March. When you have your pre-op visit with your surgeon (mine was a month prior to surgery), then you will know it is time to get prepared for your future life.
The information you will get from your Bariatric Center (or surgeon) will fully explain what you must do prior to surgery, and if you are truly serious about making this life change, you will follow everything to the letter--no matter how tough it may seem.
Those that have the "last supper syndrome" are just kidding themselves and honestly, Baboo, I don't feel any of them was ready for surgery.
Good luck to you--I know you can do it...