If you can manage to be friends w/the people who are friends to both you and your h, then you don't need to lose them. However, conversations between you and those particular friends about your h, what he's doing, etc. need cease. The old saying goes "a dog that brings a bone, will carry a bone". What is going on between your h and you needs to remain w/you and I would definitely not want them discussing the availability of the condo w/your h so that you can go there.
Bright, I know you enjoy being around your friends, but you've got to start coming to terms that if they are telling you stuff about him, then it stands to reason that they are doing the same thing w/him. Keep your conversations on fun things and not on discussions about him or your relationship.
As for FB, I know you are curious, but it's not doing you any good looking at his stuff. All it does is make you frustrated and discouraged and yes, it is on your mind at different times.
I worry about you.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.