Why does my crush run away when I talk to her?

I confessed to her before and thing got awkward between us for about a month. After that I became a close friend to her (we talk every Saturday from early morning till night) . However recently she has been ignoring me, her friend told me that she feel shy and hard to talk to me. I send her message to ask her why and she didn’t reply, when I asked her face to face she just cover her face, told me she don’t know and ran to female restroom.
Why does my crush run away when I talk to her?
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