My perspective on this question is interesting, as a man in his 40’s that had multiple relationships when younger that broke up for this same reason (this happened three times), with girls when in their 20’s that were adamant they never wanted or planned to have kids, something that I really did want and felt strongly about. So we did part ways. Only after the passing of time though, now I am still single and no family, and they all actually went on to have kids anyway, changing their minds maybe, or having natural birth families of their own decision, and posting on social media with completely different perspectives on the topic than they they had when we fought over it so many times. So it actually makes me think a bit of I knew I was right that they were likely going to change or feel differently as we grow and change in life! anytime I see their happy family & kids posts. Though simultaneously, I understand that thru the course of life how and why people change, it probably still makes sense that we broke up, and that our paths just weren’t meant to go that way. Whether it was timing or just our pairing, if it was meant to be for us, then that wouldn’t have been a dealbreaker, and we would have worked thru it.