Jason Mraz Splits With Fiancee Tristan Prettyman

 Jordan Strauss/WireImage.com

"I'm Yours" no longer: Six months after announcing their engagement, Jason Mraz and fiancee Tristan Prettyman have called it quits.

Singer-songwriter Mraz, 33, broke the sad news to the Daily Beast in NYC Tuesday night.

"My greatest mistake right now is, I've been clinging to my art," Mraz told the site. "In that, I have victory for my art and a great loss for my heart. At the moment, my beautiful fiancee is no longer my beautiful fiancee."

What happened? "Two halves don't make a whole," the "I'm Yours" crooner said. "Two wholes make a whole. In my relationship, I was giving myself away to make the relationship better, but in actuality, wasn't doing better by doing that. I became less of a man."

Mraz announced that fellow musician Prettyman had accepted his proposal on Christmas Eve 2010. The couple later explained to Us Weekly that they wouldn't actually be walking down the aisle for a while.

"We can't get married until [gay] marriage is legal and equal," Mraz said. "I think giving people the right to marry will be a huge movement in civil rights."

Although they've parted ways, there's no bad blood.

"We are still super friends, we go to yoga together, we surf together," Mraz insisted. "We acknowledge the journey that each of us is on. We certainly want each of us to feel whole and complete. And it's when you're whole and complete that that attraction exists and it really thrives."

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