Long story short (shortish), I wasn't sure if I wanted children. I've never been broody or felt anything was missing, but I hit 35 and DH & I decided to try and see, and let nature decide.
After tests and surgeries, we were offered IVF. I surprised myself by thinking 'hell, no'. I am not willing/able to go through that. It was a relief to let the whole TTC go.
I considered myself childless at that point of the failed cycles and tests etc, I definitely got caught up in it all, but years later I'm so hugely relieved to not be a parent (I am not cut out for it) and I feel very lucky to be childfree.
Sometimes not being a parent isn't a black and white choice, there's so much grey area, and I'm glad to be able to post here and wonder if anyone understands!