Jennifer Aniston is furious at ex-boyfriend John Mayer, who not only dumped her but told the paparazzi why. “I ended a relationship to be alone because I don’t want to waste anybody’s time if something’s not right,” Mayer said. Aniston, 39, had fallen hard for the playboy singer during their four-month relationship, friends say, but he had no interest in marriage. “She thought John was a gentleman, but a real gentleman wouldn’t reveal that he dumped her,” a friend told Star. “He would leave everyone wondering to save her face.”