Everyone's Friend

We all have that one friend, who's a friend but not really a friend.

Their name is similar to one of your other friend's names, so you tend to forget about them if you're not actively talking about them. They're not  a freak, as far as you know, but they do seem a little off, somehow. They don't quite dress right, they tend to not get jokes, and you've never seen them or heard about them being with a partner.

Everyone has that one friend.

Seriously, how is this being able to be everyone's friend, we need to investigate this!