Methods for weight loss are so numerous that it's a multi-billion dollar industry. The reality is that it really comes down to simple math: calories in = calories out. I lost 35lbs last year by strictly counting every single calorie that went into me. This is very hard to do but is the most accurate way.
One pound is equal to 3500 calories. So my suggestion is to go to a website where you can determine your daily calorie needs (there are many). Then take in 500 calories per day less than this. In a week you'll lose 1 pound. Exercise daily, not just a gentle walk for 20 minutes but a real, sweat producing 30-60 minute daily workout is essential.
Surgery is not an option. It's about will power and desire. Then keeping it off is even harder but there's nothing better than losing inches and getting into smaller clothing. You will never do anything has hard as this but the rewards are awesome. You can do it.