Jennifer Aniston Dumped John Mayer

Jennifer Aniston didn't get dumped by John Mayer -- it was the other way round, a source close to the former Friends actress has said.

The source -- which is said to be "super-close" to both Aniston and her best pals Courtney Cox and David Arquette -- told the Chicago Sun-Times newspaper that it was "Jen who decided to move on. She is very fond of John and has thought he might be the one.

"She finds him funny, sexy and very talented. ... Plus he understands all the aspects of living in a fishbowl. But in the final analysis, she just got tired of his roving eye."

One example can be seen in the new issue of Us Weekly magazine, which has photos of the singer frolicking in a hot tub in Cabo San Lucas, Mexico, on a trip without Aniston.

The paper reports that Aniston, 39, issued Mayer with a "three strikes and you're out" ultimatum -- after learning about his "quickie" flings with a cocktail waitress and a promoter's assistant for his concert tour.

That was two strikes. Another dalliance, with a groupie, was the final straw for Aniston.

Another source adds, "Above everything else, Jennifer is looking for stability and loyalty in a relationship. She still is hurting from losing Brad [Pitt] to Angelina [Jolie] -- even after all this time."