The guy is supposed to fall on his sword then, you know? He's supposed to bleed to death and be gone. You've made her uncomfortable. I'm uncomfortable with that; therefore, it cannot happen! Come on. Get over your discomfort. Live with a little discomfort.
what's the mean of "fall on"?
is it a mean of "attack"?
so for "fall on his sword", "attack with his sword" is the similar expresstion?
This should offer a more detailed explanation
hope this helps.