However, the rapper also said that he would like to mend the relationship with his N-Dubz bandmate and cousin.
He told Now: "We don't talk anymore. It's upsetting. I'd love to be able to hold her, cuddle her and give her a kiss again."
When asked if jealousy caused the rift, Dappy said: "Nah, it wasn't jealousy. We just had to do our own thing. She'd boss me in her way and I wouldn't like it. Poor Fazer was stuck in the middle.
"We both wanted to be the boss. We're both very stubborn. We both weren't having it. We were killing each other every day."
The N-Dubz star also spoke about the relationship between bandmates Tulisa and Fazer, saying: "Listen, with them two being a couple and me finding out about it properly, it didn't feel like N-Dubz anymore. I'll tell that to the world.
"I was glad that my best friend was the one with my cousin. But at the same time it felt like it was Tulisa and Fazer with Dappy. It didn't feel like N-Dubz."
> Dappy on 'Dappymania': 'I'm going to be a superstar'
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Watch the video for Dappy's single 'Rock Star' - which features Brian May - below: