Hey, if you want to add someone as a friend, you would go to their profile, and on the right hand side of the page, you'll see a column that says "friends" and there should say: "befriend *insert username here*" and you'll add them to your friends list, when and if they accept. :3
Anyhow, welcome to PC! Your avatar is pretty cool! Pretty-3dish me thinks. ^_^; Hey, if you want a guide, I'm your man. :3 Or, you can also a ask a staff memebr a question of the sort too. :3