Good going, Jamie. Upper Darby native Jamie Kennedy is dating his "Ghost Whisperer" co-star Jennifer Love Hewitt. "We're more than dating . . . we're more than in love," Kennedy gushed to Ryan Seacrest on the "American Idol" host's syndicated radio show the other day. Kennedy, a Monsignor Bonner High graduate, says that the busty brunette beauty breathes life into him and makes him feel like a more complete person. The actor/comedian did not return an e-mail we sent yesterday stating that he'd made Upper Darby proud and inviting any comment.