People.com: On-again off-again couple Leonardo DiCaprio and Bar Refaeli have called it quits once more, sources confirm to PEOPLE.

"They're taking time off for the time being, they've split," says a source. "It could just end up as a break but for now they're doing their own thing."

That much was certainly apparent over the weekend as the Israeli-born Sports Illustrated swimsuit model, 23, walked the red carpet at Hollywood Life's 11th Annual Young Hollywood Awards solo, refusing to speak about DiCaprio, while the Titanic star, 34, hit the hotspot Avenue in New York City, where he was seen chatting with another woman.

"He was standing at the bar in front of everyone talking to a girl the entire night - and it wasn't Bar," says one onlooker. "It was in no way behavior for a guy who has a serious girlfriend." (DiCaprio and Refaeli were then reportedly photographed together in Los Angeles on Monday night.)

According to a Refaeli source, the model's desire to get serious may have caused the actor to have doubts about their relationship. "She wanted to move faster than he did, she wanted to move in together," the source says, "so he broke it off."

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