Rob Kardashian at the 2012 Miss USA pageant the Planet Hollywood Resort & Casino in Las Vegas, Nevada.

Some reports said that reality star Rob Kardashian did not appear in his family's Christmas eve celebration.

Hollywood Life said, he didn't show up on Christmas as his family "makes him 'sick' and 'he wants nothing to do with any of them."

According to an insider of HL, "Rob has pretty much shut out all of his friends and his family," a source told Radar. "He does not have a lot of money because he's not doing anything right now and he wants nothing to do with Keeping up with the Kardashians."

"Rob is so insecure about how big he has gotten and all the rest of them care about is how skinny they are. It makes him sick," the source added. "He wants nothing to do with any of them aside from Khloe [Kardashian]. Rob thinks that his whole family sold out to the fame and wealth and says his father would roll over in his grave if he saw what has happened to their once tight family," insider added.

The insider also mentioned that 27-year-old Rob talks often about Lamar Odom than his mother.

He is living with Khloe right now because he really has no one left. Although Khloe is not with Lamar Odom, Rob still is in contact with Lamar and talks to him more than he does his own evil mother," insider concluded.

He and her sister Khloe Kardashian reportedly had a feud as some reports said that Khloe kicked off his brother from her house. The Kardashian reality star shut down the issue on Twitter by saying,

Speaking of Khloe, a clip for Dec. 29 episode of "Kourtney & Khloe Take the Hamptons" shows Khloe and her rumored boyfriend French Montana are in the bed - while Montana is naked! Check out the clip below!