Contrary to tabloid reports, Diddy and Cassie have a "Long Way 2 Go" before they get hitched. "Contrary to tabloid reports, there is no engagement. This was a complete fabrication," Diddy's rep tells People. In fact, Cassie says they're not even dating! "We are not together, but we are definitely friends," she tells the mag. "We work hard together, so it makes a good combo." Hopefully, that good combo will make Cassie's sophomore album a success when it comes out this fall…