without someone to share it with?

Some would say "You are never truly alone, for God is always with you." But, being an athiest, I have no divine companion. Others would say "You are never truly alone, Big Brother is watching you." But, I'm not a conspiracy theorist. I wear no tin-foil hat. Then how about "You are never truly alone, for you carry the people you care about with you in your memories." This I can believe, yet I have never felt more alone than when I remember someone who I once shared everything with, but never will again. A memory is not a person, and I am truly alone.