It's 'lonely at the top'. [=powerful and successful people often have few friends]
He was/felt 'lonely' without his wife and children.
the 'lonely hearts' section of the newspaper
(..) What do you know about Tom Blankenship? What? Mr. Blankenship, what do you know about him? Why? I don't know. He just looks lonely over there all by himself. Some people move to this river to work on it, and some people move here to be left alone. I want us to try and sit down (..)2012 Mud