You have to be completely sincere sounding when you break up with a girl or it will never work in your favor and you wont be able to return to that well. If you actually are sincere about it, you get bonus points for realism – but at the very least you need to be a decent actor. You want to make sure that what you say to her comes off as something you don’t want to do, but simply have to do. For her. Just fag it up enough so that she thinks there’s still hope. Yes, this is evil.