It started like a sparking, beautiful soap bubble. Now - boom! - it burst! The former dream couple Britney Spears (24) and Kevin Federline (27) has separated - only 15 months after their wedding, and three months after the birth of their son Sean Preston Michael. SHE had the locks of her Los Angeles mansion changed, had his car taken back to the dealer. HIS revenge is an interview. Kevin Federline spoke exclusively about his life with the pop princess to my colleague Peter Kent. "I love her," he says. "But when you ask me about a life without Britney, all I can say is: Can it be worse than living with her? That's how far we've grown apart." Kevin Federline is deeply hurt. And he complains, "She treated me badly, wouldn't let my friends into the house! She and her mother tried to tell me how to live my life - I just can't let that happen. And I don't know a guy with self-respect who'd let himself be treated like that! I'm just supposed to be her little husband who jumps at every command." Now, Federline wants to do what Britney apparently already did - Meet with a divorce lawyer. Federline: "I don't like lawyers, but I need protection in a situation like this. This is the situation I'm in: I'm homeless a couple of days before Christmas!" Apparently, Federline wants