Rihanna is great at playing hard to get. She and Chris Brown are pictured together all the time looking very much like a couple, but she still won't admit he's her boyfriend. Extra grilled Rihanna yesterday and asked her how things were going with her relationship, and she simply said, "No, I'm not in love."
Rihanna is probably smart not to reveal anything about her relationship to the press, because she and Chris are so young, and if they ever broke up, it would be a case of I tol ya so.
Whatever she's doing, it's working, because Chris still seems to be just as into her as ever.