I have the same issue. My best friend is against me having the surgery. She told me, "we are going to have to agree to disagree on this. I feel surgery is for the morbidly obese when there are no other options, and I don't feel that is you." My sister, same thing, "I wouldn't think you would be big enough for the surgery"
At 5'2" and 235lbs my family doctor, my surgeon and I all feel it is a wise choice. People may not agree with your decisions but they are not the ones who have to wake up every day and walk around in your shoes, so do what makes you happy, and agree to disagree.