I wasn't supposed to fall in love with the nanny.When my wife left, she took the illusion of happiness with her, and I've been caught in a free fall ever since. For nine long months, I've been fighting to figure out how to be a single dad, how to be alone.For nine long months, I've been failing.When Hannah walked through the door, I took my first breath since I'd found myself on my own. She slipped into our lives effortlessly, showing me what I've...