With the friends extension you can increase user interaction on your site by allowing users to become friends by sending & accepting/rejecting friend requests
Key Features
Adds a friendship system to your website
Displays followers/following stats on their profile
Adds a send friendship request button to profile cards on member directories
Adds a send friendship request button to every user’s profile
Adds a tab to profiles which shows a list of user’s friends
Adds a tab to profiles which shows a list of user’s friend requests.
Allow users to restrict their profile to their friends only
Users receive an email notification when someone sends them a friend request
Users receive an email notification when someone accepts their friend request
Integrations with other extensions
Notifications – Users can receive a notification when someone sends them a friend request and when someone accepts their friend request
Private Messages – Limit pivate messaging to friends so only friends can message each other
Social Activity – Limit activity displayed in the feed to activity from friends only