People believe if they achieve X, then they'll be happy.

Unfortunately, if you're not happy on the way to your goals, achieving them won't help either.

I'm single. 38 years old. No family. I travel alone, go to concerts alone, cinema alone, spend Christmas alone. No car, no house, no pile of money in the bank.

Still, I'm happier and more satisfied than most people who have all the things society considers success.

The only thing you need to be happy: know yourself, accept yourself, live accordingly.