I had a moment like this when I turned 26, having just traveled the world by myself at 25.
At 28, I upped sticks and move to the Caribbean on a whim, and I'm still here nearly 15 years later. Married, 2 kids, home, excellent career.
The worst thing you can do is expect your life to go a certain way because that's what everyone else is doing. Do what "you" want to do and work to make that happen.
There are so many, many years left to find a relationship or have babies.
But first, for the love of god find some adventure, because life isn't just about finding a relationship and reproducing. Its about finding things that make you go "wow". Doesn't have to be expensive, doesn't have to be a life changing event, doesn't have to see you jetting off around the world.
The smallest things can make you see life in a different way, and can start the spark of joy that life is about.
Life is only passing you by because you're not looking in the right places.