John Mayer isn’t proud of the way things ended with Jennifer Aniston, reports. “I’ve never really gotten over it,” he tells the latest issue of Rolling Stone. “It was one of the worst times of my life.”

The singer, 32, first got cozy with the actress, 40, in April 2008 after spending five sexy days together in Miami, but went on to split twice — most recently last January, in which he held an impromptu press conference with paparazzi outside his NYC gym to, as he hints, take the blame for the breakup with America’s sweetheart.

“I’m the a—hole,” he says. “I burned the American flag. I basically murdered an ideal.”