this one's ticking me off

So that new housemate, you know, the one I've had something to complain about pretty much every day since I got back from winter break? Yeah well....apparently, annoying the crap out of me with painfully weird courtship behavior on the front porch and her creepy/evil laugh and by co-opting various bits of my personal crockery (and having the cheek to not allow me the chance to steal it back) isn't enough. I just found out that she's co-opted my fridge space as well! Bugger. I hate having to figure out how to smack someone down in an unassuming way so that the natural order of the house (in my mind at least) is restored without any hurt feelings. How do you (nicely) tell someone that "yes, I've finally figured out that you've been using my fridge space for the last three weeks while I've been gone and yes, it's nice and clean and organized because I make a point to keep it that way so take your stuff and take a hike cos I want my space back. And by the way, clean up the mess you've made of my formerly pristine fridge!" ?? Lol. OCD much? Gah! I hate any type of real confrontation (cos the imagined confrontation scenarios in my mind are always way more awesome :D ) but I think being all passive aggressive about this is not going to work :/ boo. This is gonna take some brain power. meh.