Hi OP,
This is my story.
When I was a child/teenager myself I used to say that I didn't want kids (and get told that I wasn't normal or that I was selfish). Mum used to try to palm me off with dolls, which I didn't want and ended up throwing out of the window. I wanted teddy bears and art materials.
Before meeting DH I was single quite a lot, just having the odd short relationship here and there. I never yearned for or craved children but I think I must have started to assume that they were what I needed.
Then I met DH and it got serious. However, there was some miscommunication on the subject of kids. He said he wanted them because he assumed it was what I wanted and I said I wanted them because by then I assumed it was what I wanted and also what I thought he wanted...
I knew I had one blocked tube but became pregnant reasonably quickly. I don't remember feeling happy, just hormonal. It turned out be to ectopic. Following that we got swept up into a whirlwind of consultations for infertility, interspersed with positive pregnancy tests that never stayed positive for long (?). I think I was in competition with my body, wanting to prove it wrong in that I could have a baby if I wanted to. In the end we were offered IVF and it was very telling that neither of us were that bothered. I asked the doctors for time to think about it and ended up never going back.
DH asked me one night whether we really wanted kids, whether we weren't happy the way we were. I just remember feeling this massive sense of relief (and peace) wash over me when I said that I could quite happily not bother.
A couple of years later I got pregnant by accident and had an abortion. It was a horrible time but I don't regret it. Since then, DH has had the snip.
Kids are sweet enough in small doses but we don't crave our own. Most of the time when I see kids I think "there but for the grace of [insert deity here] go I". My youngest brother, however, has always loved kids and since having his own has found real fulfilment in fatherhood.
I also think we're overpopulated and that society is becoming increasingly unpleasant. However, to be honest, had I wanted kids I would have had them without a thought to overpopulation.
It's really worth listening to yourself, following your true nature.