I think the closer we get to surgery, it not only becomes more real for us but also the people that love us. Ideally, they would be able to share their worries and fears in a more positive way but sometimes even really good friends have a hard time communicating about sensitive topics and for a lot of us weight IS a rather sensitive topic. Of course friends and relatives might resent losing the person that made them feel less guilty about their own poor habits and they might just fear losing the FUN part of a person that's already a blast to be around. Just remind them how much more fun you'll be when you have more energy and the confidence to do more!
FWIW - When I start to feel nervous I hit up YouTube or these boards to watch and read the success stories and it helps me remember why I made this choice.