I can't stop thinking about this girl, could that be a sign she likes me too?

This girl and I barely know each other. But she has become very friendly with me recently. I noticed a change in her behaviour towards me. She just one day started smiling and waving at me. Now we talk and she asks me questions like ' who I went hiking with'. She turns around with a nice smile on her face when she sees me and says hello. She even was smiling and saying " I'll see you tomorrow". I just can't stop thinking about her.
I can't stop thinking about this girl, could that be a sign she likes me too?
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