The 37-year-old 'Blurred Lines' crooner revealed that he had not seen his estranged wife for about four months, reported Ace Showbiz.
"I try to keep most of that private, but, I haven't seen her for four months. We're cool. She's the best girl in the world, a great mother and still a good friend," Thicke said.
"But because we just weren't ever together anymore and I still had so much I wanted to apologise for and things I wanted to take responsibility for, so that's pretty much what the album's about. But I also want to wish her well and let her know that she's a great person and she deserves to have a good life," he added.
"Cheating is not why we're apart. We're apart because we just couldn't be together anymore for a while. There's a hundred different reasons, there isn't just one. There's a long list... I changed, and I got a little too selfish, a little too greedy, and little too full of myself," he said.