Love Jennifer Aniston and John Mayer as a couple? Well, we've got bad news for you -- the couple has reportedly called it quits! "There's been a bit of tension for some time," a source close to John tells UK's The Mirror. "They initially opted for a break, hoping a trial split might make them stronger. Sadly it doesn't seem to have worked."

In the end, it was John that did the dumping. "John took the decision to end things as he felt he just wasn't ready for the level of commitment that Jennifer deserved," the source says. "Contrary to reports, Jen didn't want to have kids or marry this year, but she did want to set a timetable for their future together. She also wanted him to assure her he would cut down his tours in the future when they did eventually have children." (Yeah, that can happen when you're dating someone 8 years older than you…) But don't feel too badly for Jen! A spy tells the New York Daily News that she's got a new BF already. Girl moves fast!