A Friends List (Default: J) is available from the System section of your Action Library

(Default: Y). Up to 100 avatars may be added to your Friends List.

Adding Friends

To add a friend to your Friends List, right click an avatar and choose Avatar -> Add As Friend from the interaction menu. A request is then set to the avatar to accept or decline your request. Once accepted, the avatar is added to your Friends List.

Right clicking an avatar's name in the Friends List presents you with futher options like removing the avatar from your Friends List, renaming  the friend and automatically following the friend.