I too have never marrried or had children, although I have had 2 long relationships. I have just turned 50 and have been single for nearly a year which is the longest I've gone without a relationship in my adult life.

I think you raise an interesting question and it's also interesting that it hasn't provoked a flood of comments! I have struggled with the meaning of life for as long as I can remember, but I never wanted children or considered that they might be the answer.

I've made a deliberate decision not to seek another relationship for the moment and am using this time to get to know myself better. I have actually changed countries, which has thrown up some questions of identity and culture.