Loneliness is an emotional state in which a person experiences a powerful feeling of emptiness and isolation, of being cut off, disconnected from, and alienated towards other people. The lonely person may find it difficult or even impossible to have any form of meaningful human contact. The first recorded use of the word "lonely" was in William Shakespeare's Coriolanus.

Loneliness has followed me my whole life. Everywhere. In bars, cars, sidewalks, stores. Everywhere. There's no escape. I'm God's lonely man...
I guess we suffer a lot in our society from loneliness. So much of our life is an attempt to not be lonely: 'Let's talk to each other; let's do things together so we won't be lonely.'
And yet inevitably, we are really alone in these human forms. We can pretend; we can entertain each other; but that's about the best we can do. When it comes to the actual experience of life, we're very much alone; and to expect anyone else to take away our loneliness is asking too much.