The pair split in 2009 after Brown was arrested for physically assaulting the 'Where Have You Been' singer on the night of the Grammy Awards.
According to The Mirror, Rihanna revealed in an upcoming interview with Oprah Winfrey that she often thinks about the "good memories" of her relationship with Brown.
"I am reminded by a lot of things," Rihanna admitted. "A lot of good memories we had. By the slightest things; hotel rooms, tour venues, any little thing, music, songs, and I do miss him at times."
Rumours emerged earlier in the year that Brown and Rihanna had rekindled their romance, though Rihanna has denied the reports.
She said that she is still searching for the perfect partner, explaining: "If I had it my way I want a man that loves me, cherishes me, values me, but they have to know my value in order to value me.
"They have to know my worth and they can only know my worth if I know my worth. I want them to respect me."