I've never been one to get lonely, I really have a hard time grasping the concept. If I have a friend, which I haven't had for many years now, I can enjoy socializing for periods of time - provided we have enough personal interests in common to keep a conversation going. Alcohol helps.
But I never
pine for it, and solitude alone is not enough to make me feel depressed, although being forced to spend time around a person or persons I don't want to be with can. Wrong Planet is more than enough socializing for me most days.
I guess the closest I came to feeling lonely would have been as a teen, when I was convinced romance would turn my life into Disneyland. Boy, was that a misconception.
I'll take solitude, thanks.