Glad you are here to get support. Keep posting and reading...a lot of great people here willing to listen and empathize and provide a hand.
Hon, if I had answers on how to not be hungry dunng the preop diet, I never would have needed VSG surgery. HA HA It is hard, torture really but worth every single moment of misery you may endure. Preop diet is for your own protection so during surgery you do not have any complications. Reduce the fatty liver and all. Continue to be strong...you can do this!
Also, I highly recommend you read under General Sleeve Surgery Discussions the thread about what will you need for surgery. I personally like for post op, a heating pad, G2 gatorade to sip on (do not want to get dehydrated), decaf peppermint tea, chicken Soup (strain out chicken/noodles and diluted) and wear loose clothing. Found that if I did not refrigerate my drinks, they were easier to sip on.
Good luck on upcoming surgery and keep us posted to your progress.