According to Radar Online, Rob Kardashian has skipped all of Kylie’s birthday events, and he effectively cut off all communication with his family the same week that his sister turned 18.

“Rob refused to do anything for Kylie’s birthday,” says one insider. “He is invited to everything and he refuses to come to anything.”

The source adds that Rob has been holed up in his room at Khloe Kardashian’s house and has refused to respond to any texts or phone calls from his family.

“He’s just ignoring everyone. His mom, his sisters. He just doesn’t care,” the insider claims. “He just hides out there all the time and doesn’t care if he leaves or even gets dressed.

“Rob is really making his sisters and even his mom mad. Kim still think he’s really being selfish and she want him to do things with them, not shut them out completely…They don’t know what to do anymore.”

Rob, of course, has been in isolation for months, reportedly as a result of his struggles with drug addiction and compulsive eating.

Though his family has spoken publicly about his troubles, the 28-year-old former reality star has repeatedly refused to talk to the press.

Credit: thehollywoodgossip.com