Asked her out on Facebook but no reply

I asked out the same girl I had mentioned about on Facebook. I asked her out on Facebook because there was no other way I could ask her out in person. There was one way to ask her out at the shop. But in front of other employees and customers it did not seem appropriate to me. So Facebook was the way left. Today morning when I went to the place where she works it was like she hates me or something. Avoiding me totally. Did not want to see my face. what's wrong..?
Asked her out on Facebook but no reply
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