We keep exchanging glances?

So at my college there's this girl who I think looks pretty cute. I've looked at her a few times and when she looked back I looked away because I thought she thought I was staring. However I look at her again and she's still looking at me. We've done this as we walk by each other several times now.

I recently got an assignment from my sociology class to ask 6 people: 3 males, 3 females how many people they have dated in the last 12 months. I was thinking of using that as my excuse to approach her, but how should I use this to my advantage?
We keep exchanging glances?
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