I started a Facebook account to spread gossip with friends
It's not public, is it? Do your friends know about this?
No, no one knows about this
It is good to share things with friends but you shouldn't use it to share secrets. People keep secrets for a reason and people might get hurt if you tell them. They won't trust you in the future.
My friends would have a field day reading this.
I understand it's nice to know what's going on around you, but I think there should be a limit to what's spread. You wouldn't want to unintentionally spread rumors and harmful secrets or information, would you?