* Don't compare yourself to them. When they brag just smile and compliment them sincerely. They are on their journeys, you are on yours.
* Keep the end goal in mind - health. Your weight might come off more slowly, but you are doing it in a healthy, maintainable way.
* Make choices that make you happy. Surgery forces drastic changes; you can change gradually, at your own pace, and be comfortable with where you are.
Most of all - be proud of your progress. No one can take that away from you.
"She is clothed with strength and dignity; she can laugh at the days to come" - Proverbs 31:25