How do you find peace after an argument with someone?

[Hero]

There is this girl on facebook who started an argument with me about how she hates my arrogance. But she knows very well that I am FAR MORE intelligent than she is and so posted one last comment and blocked me, deleting the entire status as well in fear of my inevitably dominating reprisal. So now she's had the last word. I hate cowards like this. People who post something and then see to it that you cannot reply! Damn it's beginning to eat at me. How do I just stop caring?
Well I know WHY I have such a problem with it. It's pride. I hate that this inferior indevidual has disrespected me and cowardly escaped without alowing me to "close" the argument. I feel as if something has been left open and she has prevented me from closing it.
Wait wait wait. I KNOW her. Pft. Would I have waisted time on someone I did not know? lol I didn't meet her on facebook
Wait wait wait. I KNOW her. Pft. Would I have waisted time on someone I did not know? lol I didn't meet her on facebook