Asking out a frined goes horribly wrong

I screwed up, asked a girl out to a dance that was a close friend…but apparently there was a misunderstanding. She…for some reason…didn’t think I asked her, while I knew I did. Although I wasn’t as clear (my retarded ass mistake), she should have gotten the message and apparently didn’t. Well a few people found out that I was going to the dance with her, including the girl herself. Then there was silence for a week…I was confused and she wouldn’t respond to any messages or would ignore me. Eventually she messaged me saying she was very sorry and there was a misunderstanding and didn’t remember me asking her out, so on and so forth. I replied kindly apologizing, and mentioning my stupidity on the night I asked her out. I also said that my invitation was still there, and if she still wanted to go with me, I would have no problem with that. So far there is no reply, just an ominous “wow” posted on facebook… Have I destroyed this good friendship because of my stupididty? Is it even possible to overcome this awkward moment, I have been sick the past few days, but when I return school what should I do? The dance is coming up…I can pretty much scrap that idea unless I somehow make everything better… Not to mention the gossip and weird looks I have to deal with for a long time… I’m pretty shy and neutral most of the time, this is the first real drama I’ve been through and so far its going BAD.