My Daughter is almost 20 and she has told me that she will never have kids, and most likely never be married. She has a steady boyfriend who is 10 years her senior and we all love him very much. But he too is fine with the no marriage and no kids future. As for me, Well I just say we shall see... Things change and they can change very quickly. So I never give up.
I have 3 adult children, none of whom are married yet. As far as I am concerned, I just want them happy, married or not.