Khloé Kardashian is still trying to help out her brother Rob Kardashian. The only male in the Kardashian family has kept out of the spotlight since he gained an estimated 100 pounds and started battling depression.

Khloé, 31, opened up to People Magazine on Wednesday about her brother's troubles and how he frustrates her.

"Rob is such a great guy," Khloé told People. "He's charming, charismatic, everything. That's what's so infuriating. I'm like, 'Where is your will to live life? Let's be around people!'"

Rob disappeared from the limelight more than a year ago, and no longer appears on the family's hit television series "Keeping up with the Kardashains." The 28-year-old even missed his sister Kim Kardashian's wedding to Kanye West.

"I've been working on my patience," she said. "I've been really trying. But I have my moments and I do snap. I've offered to get a chef, I'm like, 'What's your excuse?' But it's not just that. I can't win life for Rob. I have to wait until [he's] ready to do it for himself."

The "Keeping up with the Kardashian" star admitted to the magazine that Rob had been struggling since she split with her husband Lamar Odom in 2013.

"My dad died when Rob was 16," she explained. "Rob doesn't have a father figure in his life. When Bruce was around, he was great, but he was going through his own things that none of us understood at the time. Lamar was [Rob's father figure]. Once Lamar left - and it's not Lamar's fault at all - I think Rob didn't know where to go.

"He has to figure it out for himself. And he has so many people who want to help him," Khloé concluded.

Khloé's formally estranged husband Odom was found unconscious in a Nevada brothel earlier this month. Rob showed his support for Odom on his Instagram account and said he was "praying nonstop for my brother."