I'm. . . I'm so in love with you that I can't even stand it! Sasuke! Stay with me, and I'll never let you regret it! We'll have fun every day, and. . . And you'll be happy! I'll make sure of it! I'll do anything for you, Sasuke! Just, please. . . Please, please don't go! I'll even help you take revenge! I mean, I'll manage it somehow, so. . . So please. . . Stay with me.
With a secret like that, at some point the secret itself becomes irrelevant. The fact that you kept it does not.