How many of us are lonely? What is the cause of our loneliness?

I ask this because I noticed there are a number of fluther names that seem to hint of loneliness or separation from others in the outside society. I know that I have been quite isolated at times when I’ve been here. I have overcome that for the moment, which is good.

This applies even if you are not now lonely, but have felt lonely at any point during the time you’ve been on fluther. When you were lonely, how did it affect your fluthering? How do you explain why you are lonely? Is it the human condition? Is it something about you? Is it something about other people?