This mysterious girl knows a lot about me. Does she like me?

She keeps to herself usually, but she's moderately social if anyone talks to her. We hardly speak unless we have to, but lately I've noticed she knows things about me that I haven't even told her. Like the other day a guy that's friends with both of us, we'll call him Drew, invited a small group of friends to go bowling. While there, she got me Dr. Pepper which is my favorite, "guessed" my shoe size correctly for the bowling shoes, and even the right snack at the snack machine and every time I asked how she knew, she just shrugged or said she noticed I liked it and nothing else. She couldn't have figured this out by stalking. Is she really focused on me? Does that mean she's into me?