What a coincidence, I am also about to have a roommate again. I REALLY liked living alone, and my pet snakes liked it, too. It will certainly be an adjustment.
I would start off by trying to be the first one to move in. That way, you can put all your crap in your roommate's room, and hide stuff in her closets. Snakes love closets, for example. You can also paint all the rooms the colors of your choice, and put up your naked paintings everywhere - that way, it will feel like home to you, and your roommate won't have a choice because it will already be done. You should find a nice, central location for your model of the Death Star, like right in the middle of your roommate's living room. She'll appreciate the gesture.
Since you hate human contact, you should make sure that all doors shut well, and just slam them in your roommate's face whenever she so much as walks by the door. In no time, you will have her trained to avoid coming anywhere near your rooms.
I find that cooking strong-smelling foods that other people find disgusting is an excellent way to make your new place feel like home while driving your roommate out of the kitchen, thus leaving you plenty of room for your housewares.
Finally, you should set the thermostat to the temperature you find to be the most comfortable, then break the thermostat.
Hope this helps!
Ta