We're talking about a girl who was knee deep in sanitizer and couldnt figure out a sink...if you were able to come up with anything that made you look dumber than she did, then congratulations!
You are probably way overanalyzing things. Plus...shes your boss? That isnt a good thing. If you think there's chemistry it may just be that shes a nice boss (or the sanitizer was making her woozy). I wouldnt press the issue at all until and unless she did.
But of course, theres nothing wrong with having friendly conversations with a female. I kind of like the idea of giving her a nickname (I give nicknames to most people I know, mostly because it helps me remember them, but they all feel like its a special thing). Whatever you do to get confortable, do that. And remember, this is a random chick, not a supermodel...there really isnt any reason to be nervous. Talk about normal stuff, because, you know...shes normal.