"It's not a break. It's done," people.com quoted a source as saying.
"They're just in two different places in their lives - he's in college and she's focused on her music and career," the source added.
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Cyrus, 22, has been busy recording in the studio, travelling with friends and attending events solo without Schwarzenegger, 21.
The duo have not been spotted since earlier this month when they were seen having lunch together here at a restaurant.
