I remember on the morning of my surgery saying to my partner "Do you think I can just lose the weight and keep it off on my own and not do the surgery?" That was obviously nerves talking, but his answer made perfect sense. He said, "If you could, you would have by now".
Bariatric surgery is NOT a failure. It's still hard work after surgery to lose and maintain for the rest of your life. It's about using a tool to make the best choices for your health. You'll still have to eat properly and exercise, but WLS is the tool that will help you to learn how to change not only your weight, but your mindset.
Since my bypass 11 months ago I have become intolerant of a good few foods - not a bad thing when they include sugary foods, fatty foods and absolutely intolerant of anything chocolate. It's not easy but it's your health you need to consider.