AceShowbiz -

There it is, following an endless speculation on their romance being on rocks, talk is heating up that Bar Refaeli has dumped actor boyfriend Leonardo DiCaprio.

Rumor has it that the Israeli model brought an end to their six-month relationship because she was unable to cope with the hunk's hectic work schedule and constant partying.

"Bar is a professional model so she has to be healthy and look great every day, so there is no way that she could keep up with that kind of decadent lifestyle," a friend of Refaeli's tells British newspaper News Of The World.

"When they were apart she worried about what he was up to and in the end decided it would be easier and less painful just to say enough is enough," the friend added. Elsewhere, Leo's camp said, "Leo was gutted when Bar told him it was over. But he is at the top of his game at the moment and there's no danger of his changing his ways any time soon."