Flume provides complete support for viewing and sharing with your Favorites, otherwise known as "Close Friends".
Posts that are only visible by Favorites are indicated by a
Close Friends label.
To share new posts to just your favorites / close friends, see Sharing to Your Favorites/Close Friends.
To edit your close friends list:
Edit Close Friends List button in the title bar.
Advanced Settings button in the Upload window and select
Edit Your Close Friends List