Share 'I need more friends, I'm so lonely and my heart hurts...Please help!'

So, I've been watching parts of this and I started thinking about friends and loneliness...How does friendships work? What makes a good friend? When do you "break up" with a friend? And how? I feel I have so many people I know, but not many I would share the things I do on this site...As a matter of fact, none of them know that I'm even on here...Or even know about this site...I don't feel like...