Scott Disick says Rob Kardashian is "doing really good" right now.

Rob Kardashian

Rob Kardashian

Although the 30-year-old reality TV star is living separately from his on/off fiancée Blac Chyna at the moment, Scott - who has three children with Rob's sister Kourtney - insists that he is doing well.

He told PEOPLE: "Rob really is a positive person, so no matter where he's at, he always sounds pretty good, so I think he's doing good. We live down the street so I see him a lot, and he seems to be doing good - new dad, he's excited, he loves his daughter to death, so it can't be that bad."

And Chyna, 28, recently revealed that she and Rob are having therapy and "fighting for each other".

She said: "I feel like every person who's in a long-term relationship, or who is committed to their person, goes through ups and downs. Everything isn't always going to be peaches and cream. If it is, then it's fake. I'm in it for the long haul, so I feel like my advice [for anyone in a similar situation] is therapy, know each other's family, calling each other's moms.

"I feel like everything isn't going to be perfect, but I know we love each other and we're fighting for each other, and the people we surround ourselves with are rooting for us. It makes everything much easier.

"And we also have Dream. So we're looking at the bigger picture. We have a whole other human being that looks up to us, so we have to makes sure she's taken care of."

"He's a wonderful dad. I think it's because he had such a great father."