Your daughter will be fine married or unmarried, it doesn't matter. Well, it matters when children come into the picture, but that is another discussion. It may well be that she doesn't marry. But then, she may marry.
I didn't get married until I was 35, same with DH. I was indifferent to getting married, didn't care either way. We are well suited to give each other the freedom we both need, which actually isn't much, we are both homebodies.He is a whole lot more flexible in lifestyle than I am, though. But then, I am the one to craft the interesting arcs of our lives, or so I think, haha.