this is not always true, because i was at his birthday party last year, he accepted my friend request and, actually, we are now close friends (he showed us magic carpet and blue ears!!!!!!)
He may have a certain few on his friends list... But as I said before, and as most staff will tell you, they can not accept friend requests. I wouldn't go into his room with the hope of being on his friends list and after all, there's a limit to how many friends we can have on our lists.