I never talked to this girl (classmate) and I do not know if she likes me?

I sometimes catch her looking at me and once, when I am right next to her, she checks herself out with her phone and fixes her hair. Also, when we are walking past each other, she smiles out of nowhere. Another time, when I am walking behind her, she kind of turns her head and uses the side of her eye to look at me and walk away from me fast.

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I sometimes catch her looking at me and once, when I am right next to her, she checks herself out with her phone and fixes her hair. Also, when we are walking past each other, she smiles out of nowhere. Another time, when I am walking behind her, she kind of turns her head and uses the side of her eye to look at me and walk away from me fast. I was wondering if she likes me and how do i approach her and ask for her number without being weird.
I never talked to this girl (classmate) and I do not know if she likes me?
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