Index -> Miscellaneous -> Buddy Lists

Buddy Lists

A Buddy List is a list you make of other players that you enjoy interacting with. You can set games you make to only be open to others on your Buddy List, and players on your Buddy List will appear near the top of the user list, just under staff, in all lobbies.

You can add or remove users from your Buddy List from the Buddy and Ignore Lists Preferences Tab as well as from the Chat Window in any matchmaking lobby.