Unfortunately, band surgery happens in your abdomen, not your head. Your band can't do its job alone. You have to be in charge of making good food choices, monitoring portions, exercising, dealing with emotional/stress/boredom eating, and so on. It's very hard work, but if you somehow managed to lose 100% of your excess weight without breaking bad habits and making lifestyle changes, your chances of weight regain would be very high.
Can you think of just one good thing that's happened because of your band surgery? For example: your appetite has decreased, you're hungry less often, you're satisfied with smaller food portions, your mobility is better, you have more energy, or whatever? Even if nothing springs to mind immediately, spend the next few days considering the question, and when you find that one good thing, Celebrate it. If you keep up the hard work, more good things will follow. In the meantime, keep on keeping on!
Jean