Sorry it's not working out in your favour. I suppose the only thing left to do is to make the time you have with her an absolute HELL. "Scorched Earth" is, I believe, the technical term.
In addition to blasting out Borderlands, I would recommend finding a good recording of a battleship's main battery being fired. I found one on YouTube, cranked up my speakers and dove for cover. Did I mention that this was done at five in the morning?
Anyway, I wish luck to you with the house hunting and a 16' semi-armour piercing shell to your flatmate's nether regions!
