Rocker John Mayer has ended his highly-publicized romance with unlucky in love actress Jennifer Aniston.

“There’s been a bit of tension for some time,” a pal close to John, 30, revealed to The Mirror on Wednesday. “They initially opted for a break, hoping a trial split might make them stronger. Sadly it doesn’t seem to have worked.”

“John took the decision to end things as he felt he just wasn’t ready for the level of commitment that Jennifer deserved,” the insider explains.

“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.”

The tabloid source adds, “Initially, Jennifer was furious when he told her of his decision but now she’s simply sad – not to mention a little heartbroken.”

“They have spoken on the phone since the split and are trying to remain on good terms, but unless John has a dramatic change of heart, it’s unlikely they’ll rekindle their romance.”