The X Factor judge, 24, is said to have called time on their relationship to concentrate on her career.
According to The Sun, 'R.I.P.' singer Rita was forced to choose her career over love.
The newspaper reports that Rita split from 25-year-old Ricky - the son of famous fashion designer Tommy Hilfiger - after an emotional meeting in LA two weeks ago.
Rita is said to spoken to Ricky by phone after she'd returned to the UK, but failed to patch up their long-distance romance.
Things had been strained for a while, says the newspaper, with both parties concentrating on work.
A source said: "Rita and Ricky found it difficult to continue their relationship due to their ongoing work commitments.
"They both tried to make it work but their schedules made it difficult. They are on two different sides of the Atlantic and Rita is going to be based in the UK for the next five months."
The pair are believed to have stayed friends after the amicable split.
However, The Mirror writes that Ricky struggled with Rita's showbiz lifestyle, which sparked rows between them.
Rita has previously dated DJ Calvin Harris and Rob Kardashian. Both relationships ended messily.
Calvin is now totally loved-up with popstar Taylor Swift.
Watch the video to Rita Ora's single 'Poison' below:
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