Girls, How to impress a girl you like?

There is a girl i added on FB, she is nice looking, i started sending messages, and she was responding quick and laughing, but i was trying to stop repeating my previous mistakes, i let here start the dm to not look creepy, it was going well until i accepted to buy a ticket to a party , then she said "see you soon" after i came to the party i've seen here once, busy with stuff to fix (cause she was part of the club holding the party) so i waited then i didn't see here, i feel i missed my chance with her, but i'm trying to fix it!
Do i have to be honest and tell that i like her?
Will that be seen weird?
Girls, How to impress a girl you like?
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