This is a tough spot. It's so hard to know what she is thinking, impossible really.
I think it's best to just keep doing what you have been, and play it by ear. See if there's another good opportunity to ask her out soon, maybe she will even drop a hint.
I wonder if she was testing her "feelings". If so, seems like you passed! It may actually make her even more cautious, though, so she might cool off a bit now. Be prepared.
My only caution would be to not get into this too deep too fast. I know that's probably impossible, but just try if you can.
~ Nicola
Life isn't about finding yourself; it's about creating yourself My thread: Trusting God's Plan