ADDING FRIENDS
After you have grown close to someone or have made friends you can ask if want to be your online friend. To do this click on their profile followed by selecting User List and adding them as a friend.
The other advantage to doing this is that off your profile you can find there details much easier allowing you to send private messages
You then have to wait for them to accept or decline your friendship request. You can also befriend someone at any point from your user profile area.