Anyone else feel left out sometimes for being child-free?

My husband and I are child-free, and for the most part, we're genuinely happy with our life. We both have work, hobbies, travel plans, and a peaceful routine. This isn't something that bothers me every day.

But every now and then, I get this strange feeling that I can't shake.

We live in a society where almost every family has kids. In the evenings, I see parents playing with their children, families hanging out together, birthday parties, school events, etc. Sometimes it makes me feel like we're on the outside looking in.

I've also noticed that in many families, the siblings who have children naturally get more attention because there are grandkids involved. Friends also seem to drift toward other friends who have kids because they're in the same stage of life. It makes me wonder if, over time, child-free couples slowly become... less included.

Then there's the future. I know having children is never a guarantee that they'll be close to you or take care of you, and that's not why I would ever have a child. But I still occasionally wonder what life will look like when it's just the two of us in our 60s or 70s. That thought can be unsettling sometimes.

I'm not asking whether having kids is "better" or "worse." I'm more curious about the emotional side of being child-free.

Do any other child-free people experience these feelings occasionally? If you do, how do you deal with them? Did these worries fade with time, or did you build a different kind of community and support system?

I'd love to hear honest experiences from people who have been child-free for many years.