I hear ya.

My friend George was giving me a hard time and I said in a very polite tone of voice, "Hey, thanks a lot for being a good friend and supporting me in my decision." He kinda looked shocked I said that. He then said, "Well, then, if you think it's good for your body, then do it." He said it in a supportive way (not sarcastic)...so I guess he got the hint!
My true feelings about surgery and...if people make you feel upset by what they say, you may be having second thoughts subconsciously and/or second guessing your choice. If you can "shut them up" (nicely or not) then you are strong in your AGB decision.

But, that's MY opinion.