When she is calm and alone with you, ask her, "You know how I never keep things from you?" She may respond by simply nodding. "Well, I accidentally let a secret slip out of my mouth." Her eyes may bulge and ask which secret and who did you tell. "Please don't get mad at me. It was the time you told me (fill in the blank with secret). I told (fill in the blank with boyfriend's name)." I hope this helps!
depends on the secret some secrets people won't mind at all about. :P but taz funny you just gave her bf something to get at her with. Like if he wants somethin from her he's ganna use the secret to get it maybe. ...But i really don't know there are a lot of different type of secrets, like secrets that will make someone hate you a lot, to secrets that r rly embarrasing or cute, or disgusting stuff you don't want people to know. IT RLY DEPENDS XO