The last thing you want to do is steal your girl's shot at ripping your heart out. Chances are that if you're feeling like things are over, the feeling is mutual. If that's the case, then she is already planning her exit approach with her girls. If you beat her to the punch, all of her efforts will be in vain, and you'll just make her angry. She wasn't prepared to have the script flipped on her, so be a gentleman and let her do the honors. If she's taking too long to end things, throw some hints her way so she knows the time on the clock is about to run out.