Our notions about happiness entrap us. We forget that they are just ideas. Our idea of happiness can prevent us from actually being happy. We fail to see the opportunity for joy that is right in front of us when we are caught in a belief that happiness should take a particular form.
It is our own mental attitude which makes the world what it is for us. Our thoughts make things beautiful, our thoughts make things ugly. The whole world is in our own minds. Learn to see things in the proper light.