If you aren't dating anyone at the moment, just pretend you are.
I'd say the cutest thing she does is since she's originally from Honduras, she speaks Spanish really fast when she gets mad at me; I haven't the slightest idea what she's saying, but I think it's just absolutely adorable.
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Tickle fights dude. There's nothing cuter than a girl begging you to stop tickling her, and then being surprise attacked. [i]single now though [spoiler]looks off longingly into the distance: Ya don't tickle your hookups though, that's just weird.[/spoiler][/i]