Rob Kardashian moved out of Blac Chyna's home and thought they had split when she was five months pregnant.

Rob Kardashian and Blac Chyna

Rob Kardashian and Blac Chyna

The sock designer was in despair after a big bust up with his fiancée, so much so he left their abode and declared to sister Khloe Kardashian that he was "so over" the 28-year-old star.

Speaking on the latest episode of 'Keeping Up With the Kardashians', he told his sibling: "I'm out of her house and we're not living together.

"Honestly, I'm so over it. If I don't care then that's exactly where she wants me to be and I'm completely content with that. And I'm just preparing myself.

"I'm not doing nothing wrong. I'm doing exactly what she wants.

"So I don't know what I need to do. It's just a lot of s**t. I don't know. I just don't."

Rob's family became concerned about him following the bust up and Khloe revealed Chyna had told Kris Jenner that her 29-year-old son - who spent almost two years out of the spotlight as he battled depression and weight gain - had "the same issues he had before".

Khloe said: "I know when my brother hurts how badly he does hurt.

"The more they're fighting and the longer things are bothering him the more depressed he gets - he'll go into hiding again, go missing.

"I don't want Rob to live that life anymore."

Fortunately, Rob and Chyna were back together by the end of the episode and he admitted he didn't want to argue with her anymore.

He said: "I mean, it's been tough. It's really just ... it takes either one person to man up, obviously that's gonna have to be me. But at the same time I'm not gonna argue with a female."