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
(..) Or ride our bike around the hall? I think some company is overdue... I've started talking to the pictures on the walls. Hang in there, Joan. It gets a little lonely all these empty rooms. Just watching the hours tick by. I'm scared. It's getting stronger. Getting upset only makes it worse. (..)2013 Frozen