What if you knew in advance that the love of your life was coming your way? What if you knew his or her identity, and the only thing still unknown was when it would happen? It is that way with Washington – or at least the segment of the metropolis that loves its sports teams and the stars who populate them – and Bryce Harper. Trust us. It is going to be silly, giddy, sloppy, head-over-heels love. We tell you this now as a public service, so you can prepare yourself for it. “My prediction,” says Harolyn Cardozo, the Nationals assistant to the general manager and a keen observer of the athletic psyche, “is that Washington ties its balloon to his, and they float away together.”