Kim Kardashian was dumped by Reggie Bush because of her sex tape.

The American footballer but he was uneasy about settling down with the socialite because the 2007 video - which features raunchy footage of the brunette and her then-boyfriend Ray J - made his mother uncomfortable.

A source told X17 online: "Reggie's mom just could not get over the fact that Kim had a sex tape. Reggie and his family are very conservative, and he told Kim that a marriage is never going to happen between them because of the tape."

Kim is said to regret the video more than ever now as she believes she would still be with Reggie, 25, if it had never been made public.

The source added: "She's still crazy about him. If she didn't have the sex tape, she could have been Mrs. Bush."

While the 'Keeping Up With The Kardashians' star is struggling to cope with the split, the sportsman is throwing himself into the single life.

A friend said: "Reggie is surrounded by a bunch of his single friends. He wants to be a party guy, hang with the boys and date other people."

Kim is currently in Miami, Florida, with her sisters Khloe and Kourtney Kardashian but plans to attempt to build a friendship with her former lover when she returns to Los Angeles in the coming weeks.

One insider told E!: "There hasn't been any communication as of late. But that will change once she gets back to Los Angeles.

"They have a dog together and stuff at each other's homes. It's not like they're enemies. They will work on their friendship, but it will happen very slowly."

News of Reggie and Kim's separation came less than a month after the couple - who had been dating for almost three years - reportedly bought a $4.8 million love nest together in Beverly Hills.