It is possible in Belote Multiplayer to add anyone as a friend. So you can send Surprises Gifts and redo games together. To do this, simply go to the profile of the person concerned. 

The procedure to follow is: 
  1. Click the profile picture
  2. They're Belote profile opens. 
  3. Click "Add as friend" on the top right of your screen. 
A friend request will be sent to that person. For them to see if they want to accept you or not afterwards. 

You can find and manage friend requests in the message center (envelope icon) in the "Ask Friends" section.