I'm not sure what exactly to say in this situation, but I want to share an experience I've had:

I came to the US from Brazil, and it was a huge culture shock. One of the worst things that happened was that I made a lot of enemies because everybody assumed I was overly flirty.
I wasn't, it was just my culture that was different, and I had different behaviors that were seen as perfectly normal in my country. This one girl flipped a ***** once because I said hi to her boyfriend and gave him a hug.
It irritated me to no end - how could these people be so thick??, I thought.

If it had been the me of back then, I would've also been very irritated if someone felt they needed to "turn me down" because they assumed I was flirting with them when I was just being friendly. I would've thought to myself, "Could they be any more full of themselves?! You're not that special!!"

I learned it's best to be cautious with trying to read people's signals instead of jumping the gun and assuming something that might be wrong.

I don't know if this girl is of a different nationality than you, but if she is, I would greatly consider a difference in culture as being the "culprit".

I also agree with MacabreMagpie. It's best to wait for an actual move rather than trying to make a preemptive move.