And Caren here is the very best example of someone who could well be jealous as she has been refused funding when all of us are bleating on about our successes, still being so happy for everyone. She's a shining example of how to behave and I admire you so much Caren. I really hope you get your sleeve abroad.
As to facebook, I agree, people should shut up; if they don't like it, don't read it.
However, (and I know this is controversial and not everyone will agree), I do believe in not rubbing other people's faces in what we have and what they don't have. If people do get jealous it can result in bad karma for you down the line. On a forum dedicated to weight loss surgery it's the right place to share your success, but maybe "out there", a private facebook group could be set up just for people interested in your weight loss journey.
I dunno, I prefer keeping a low profile to avoid jealousies. But as I said, that's just me!
Then again, I don't think those people are your real friends, if they were, they would be happy for you.