Bright, I wouldn't worry too much about people who are friends w/your h. If the friends where your friends too, then invite them over to your FB page. They will either accept or not. Don't sweat the small stuff.
I hope you are feeling better today and can go to the party. You've been looking forward to it for a while and I would hate to see you miss it.
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.