Jason Derulo gets "tired of playing nice" about his split from Jordin Sparks.

Jason Derulo

Jason Derulo

The 'Talk Dirty' hitmaker, who ended his relationship with the 25-year-old singer last September after three years of dating, believes he was "gentlemanly" about their breakup, even though she later accused him of leasing a BMW he gave her instead of buying it.

But he said: "I do get tired of playing nice. Especially when people think I did something wrong, or that she broke up with me. But it's so behind me."

The 25-year-old star isn't looking for a new girlfriend because he is "married" to his career, but claims his love life is like a "a deck of cards" at the moment.

He told Billboard magazine: "You can't pull me out of the studio. Songwriting is a muscle. The more you do it, the better you get at it."

While Jason is still happily single, Jordin recently confirmed she is dating 22-year-old rapper Sage the Gemini.

Asked about photographs of them on her Instagram feed, she said: "I think they're pretty obvious. We're having fun. He's a really good guy, and the pictures speak for themselves ... I don't just kiss people!"