Doug Reinhardt and Amanda Bynes arrive at the 1st Celebrity Basketball Game Hosted By Education Advantage Foundation at Beverly Hills High School on January 13, 2009 in Beverly Hills, CA.
Michael Bezjian/WireImage.com

Amanda Bynes has split with baseball player Doug Reinhardt .

"She ended it. She had had enough," a source close to the actress tells Usmagazine.com. "Her friends didn't trust him. Everyone thought he was using her for celebrity. He was not good, and she was over it. It was definitely her who ended it."

The two began dating late last year.

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On Tuesday, Reinhardt -- who previously dated Lauren Conrad -- denied that their relationship was on the rocks.

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"Amanda's great - she's an awesome girl," he told Us. "We're having a lot of fun.

"Everything is really good," he went on. "We were just in the Bahamas, and we spent Christmas together ... everything's really solid."

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Bynes recently told January's Cosmopolitan that she "never" wants to wed.

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"I feel trapped with the idea of marriage," she said. "How can you really be with somebody forever? I'd get bored! As I get older, I don't settle. I'd rather tell somebody, 'This is what I want -- take it or leave it.'"