I totally understand what you are going through. I'd say about 99% of my friends are of a healthy weight, some of them even too skinny in my opinion! However, I have only told one of my friends -- my best friend -- and I am so glad I did. She is supporting me 100% but it is hard because we no longer live in the same town. I of course also told my mom, my stepdad, and my brother, and there are a few others because of them that know (hair dresser included -- she was banded 5 years ago), but ultimately, it was the toughest decision for me to NOT tell my other close friends. Sometimes we realize that it is just better to keep some things to ourselves. I did, however, promise myself that I would never lie to my close friends about it, so in the meantime I plan on telling them that I am simply eating less or watching what I eat-- no breads and such. When the moment is right, or if I feel that I really need their support, I will confide in them. If they inquire about WLS or perhaps one day even decide they need it for themselves, I will of course fess up.
Otherwise, I have found all the support I need on this very website!
Another thing I found helpful was going to my hospital's support group meeting for patients with the lapband. You should really look into seeing if your hospital has one. It was a totally different experience talking one on one with people who have the same problems, and people who are a few months ahead of me in the process! On the plus side, they are also nearby, so a couple of new friends are possible too.
Good luck!