Am I the only one that can really see what you've got here?
You've got a fucking get out of jail free card. An ace in the hole. Fuk man, are you blind?
The answer is simple - you dont fucking tell her.
Untill you are ready to get rid of her
And then she will be gone... no stalking you, no calling you up crying, no begging you to come back.
Fucking fantastic... Save it for when you really need it.