Jim, my friend, to each his own. I could never imagine myself single---even when I was. Ever since I can remember I was envisioning my perfect partner and my loving family......and at the age of 27 I had already had two children and my wonderful husband....at 37 we made them kids 3...and if life wasn't such a bumpy ride, I would have had one more child.
Some people have not learned to share or take on responsibilities while others were drowned in them. So as the other writers have already said, it's an individual journey each needs to take. But think about one thing....in 20-30 how would you like to see yourself? That'll help you decide.
Hope this helps you get started on writing, else why would you be here?