Once upon a time we were brought up on fairytales. If we were lucky, they said, we would meet a prince or princess and live happily ever after. If not, we would tread a lonely road to the grave, with only cats to comfort us.
You were out looking for a little happiness when you stumbled upon Dr. Jekyll as he was appearing wonderful and considerate. Strangely, before you knew it, evil Mr. Hyde was instead dismantling anything that resembled happiness and leaving in it's wake, destruction and despair. Despair is a long way from the happiness you were initially seeking.
Stop beating yourself up, and turn your emotions into action. Have you ever felt like life would be better if you had taken a different path? If only you had pursued that job, ended that relationship sooner or moved to a new city, everything would be just perfect. Nonsense, of course.