Simple question girls. Should I tell a girl she's pretty?

Hi, so I liked this girl since starting of this year and she called me pretty boy in May but I never respond anything about it to her because I I didn't know how to respond it but can I tell a girl she's pretty?

I don't know how she would react but I know she likes me but I can never confront her about it
Simple question girls. Should I tell a girl she's pretty?
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