Hahahaha!
I wish people would post stuff like that on my stupid FB. I am incredibly amused by people who talk shit through social sites or texting or something, even more so by people who use it as their sole means to have a difficult conversation with someone. Just lets you know who the teal pansy's ... pansies... whatever, are.
And I wouldn't worry about it, she obviously doesn't really like you so who cares what she thinks. Unless you have some burnig need for revenge or something, just let it go. If I was you I'd just forget about it, and if you really want to adress the situation and discuss it then go up to her in person and do so, show her that you aren't one of those pussies that need some piece of tech or a website as an intermediary between the two of you.