Are they or aren't they? Though Twilight fans desperately want Robert Pattinson and Kristen Stewart to be a couple, the pair — if they even are a couple — stubbornly refuses to confirm their status. Despite rumors of the stars kissing and both of them showing up at this week's Remember Me premiere, we have no idea if they are just good friends or a secret couple.People have different reasons for keeping relationships secret. In the case of celebrities, it's often to avoid publicity, but we regular folk might keep our coupledom on the down low if it could cause personal drama, complications at work, or other scandal. Have you ever kept a relationship secret? Please, dish the dirt.