Yeah, but that hurt. She was friendly and nice last night. What happened?
Okay.
First: chill. You had a chat last night and that was that. I am not privey to the content of the exchange, but odds are that it was light. Do not "latch-on" quickly. Relax, breathe, and take it easy.
Second: When a female is interested, she has way of letting you know.
Third: NEVER come-on too strong. That applies to both men and women.
I am sure that others will provide advice, but this is just my two cents worth.