Or you could show up drunk and uninvited at 3AM and see what happens. That's how I finished things with my ex. Just don't make any threats or bring any weapons and the most they can charge you with is 2nd Degree Harassment, which is a violation in NY.
It's a good mix. I'm pretty sure this one guy keeps coming through my line at work hoping I'll suddenly turn gay and wanna bang him.
But frankly, even if I was gay, I could do better than that dude.