I would suggest you do some more research into which surgery to get. There are pros and cons to each. Many people choose the sleeve over gastric bypass because it has a lower risk of dumping syndrome, vitamin deficiencies, and ulcers. Most doctors want to do what’s best for the patient, so they should be able to explain why they recommend the sleeve for you.
Do you know how many calories you are eating? Have you tried measuring and tracking your food? At your height and weight, you are eating approximately 2500 calories per day, and you will need to eat less to lose weight. Either surgery works as a tool to help you eat less, which is how you lose the weight.