The rumors first began when multiple sources told People that the couple of three years had split due to his commitment issues.
"They're taking time off for the time being, they've split," said one informant. "It could just end up as a break but for now they're doing their own thing."
Apparently Refaeli wanted to move in together and the Titanic star didn't. Read: The Truth About Moving in Together
When Refaeli walked the red carpet at The Young Hollywood Awards on Sunday, Us Weekly asked her what makes their relationship work. The 23-year-old supermodel dodged the question by saying, "Oh, I'm not going to get into that."
Also according to People, Leo was also spotted the previous week chatting up a mystery woman at a New York City venue.
Despite all these breakup signs, DiCaprio and Refaeli were spotted on June 8 shopping together at Barnes & Noble. Furthermore, another source close to the two assures that they are still an item, Us Weekly reports.
The on-again, off-again pair took time off from each other last September, but reconciled months later. Engagement rumors had cropped up in March when Leo met Bar's parents in Israel, but sources at the time denied that claim.