Are you too old to have kids now or do you still have time?

I wanted babies once, but now I can’t think of anything worse than the responsibility of children, but I do think they make a house a home. At any rate I’m no longer in my thirties and probably can’t have any. I look very young, but no I don’t have a partner and by the time I’d settled down with one it would likely to be too late. I don’t know whether to feel gratitude or sorrow over that. I’m more sad over not being married.