How to give up on someone? reply soon as possible?

I asked a girl she was so desperate before I proposed her. now she behaves like she doesn't know me at all I don't know how to give up I need a advice. If I care I am being desperate. It's becoming a one-sided conversation.
Updates:
1 y
She didn't respond to my proposal at all
How to give up on someone? reply soon as possible?
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