This female did the right thing. She is not interested in you, and didn't want to give you the 'wrong' impression. If you were not trying to impress her, you would have mentioned you received the card for free.

I accepted something from a guy ONCE, and now he keeps pestering me and complementing me. Maybe he feels now I owe him and need to put out? I think I will post the item back to him, Then maybe he might get the message to back the fuck off. (I have been ignoring him, but that hasn't been working.)