Girl walks past and looks at me out of the corner of her eye just before walking by?

Would you say she's interested or into me? I wasn't really noticing her but saw her come down the stairs and walk past me without looking then last minute just before she walked by she glanced at me. Okay, she stood near me to wait for the train (well one car down). We were getting rready to board and she was hopping on the other train, I ended up moving to get on the other train with her.

When we reached our stop (same stop) she was walking very slowly in front of me and when we got out on top she immediately asked some girl for directions. I took it as a sign that she didn't want me to approach her.

Thoughts?
Girl walks past and looks at me out of the corner of her eye just before walking by?
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