To see only the games in which your friends participate, press the filter button, which is located in the upper right corner of the screen when you enter the Play with Friends room. A list of all the options you can use to filter already created games will appear. To select only games with your friends, go to the bottom and choose whether you want them to be games in which your friend is the host of the game (host-friend option) or games in which your friend is a participant in the game (player-friend option). Click the filter button to start the search.