You think you know what you'll be when you grow up. Then you get to a reasonably grown-up place in your life and still have no clue what you want to be. More school sounds expensive. And so much for that 4 year degree. Maybe you should start all over, major in Human Physiology and become a doctor. Doctors seem happy.
You think you'll grow up, find a great guy, and get married. It'll be perfect! You'll sit at a coffee shop on Saturday mornings and read the paper. Chat about random acts of kindness and dream about the future. And you'll always have someone to be with.
Then someday you'll have kids. They'll be the most beautiful kids you've ever seen. Not to mention smart and athletic. And they'll adore you and you'll adore them. They'll grow up to be happy and healthy and they'll still come home on the holidays and bring their families.
Maybe it just seems like everyone else is happy and have it all figured out. Maybe they really do. Maybe they're just good at pretending. Or maybe it just wasn't meant to be. It's a nice thought though.