"There are a lot of ... places that we've been to together, music, different things that come up that are reminders of your ex," the singer, 21, tells the Atlanta radio station Q100. "When [his music] comes on the radio, I don't ... turn it off. I like his music."
She adds: "I've gotten over it, but there are definitely constant reminders ... songs that were our favorite songs, or hit songs."
But fans can disregard rumors of her pairing up with 90210 star Tristan Wilds – she doesn't even have his phone number, she says.
"This is funny: I had a house party, and you know how you hold house parties and people come over you don't even know," she says. "He came by, brought his friends, and everyone was hanging out, but I don't even have his number. So I don't know how I could be dating him."
In fact, like her ex, Rihanna isn't ready to hit the singles scene yet.
"No. I'm a very flirty girl, though," she says. "I don't think I have all the time for a commitment right now, or the energy. A relationship is another life, another career, really."