My sister had a bypass done some years ago. Lost all the weight and gained it all back and then some. She's the biggest she's ever been these days, BUT she also has a lot of mental issues and addictions that she never really got help for that led her weight gain. For this reason alone, I haven't told most of my family because they'll automatically associate my decision with hers. We are not even close to being alike in any way, shape, or form.
I told my husband, he supports me. He wants me to be happier about my health/weight and tells me all the time to do what I feel like I need to do, no matter the costs, etc. I also suspect that he wants me to be the "hot" again. LOL My youngest brother had concerns, "why don't you just eat better?" I quickly told him to educate himself on bariatric surgery before he slams my decision. Two days later he texts me and says he will be here for me for whatever decision I make. And my sister in law to whom I'm very close to says she's a supporter. I have told some friends and they're on board (but I don't need nor care if they approve or not). I think overall, the only person I need approval from is my husband. That's all that matters to me.