We just look at eachother and smile?

I'm struggling to decide what's going on. Me and this girl we just very often look up at each other and just smirk. I no I do it because I fancy her but I'm wondering what she may think? E. g. We sit opposite eachither at the canteen and if someone says something funny about me or her, we just look up at eachother stare into our eyes and smile.
sounds weird I know haha
We just look at eachother and smile?
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