I think you're way too nice. Even though she's a long time friend, I think that I would've at least had some house rules written up and signed by her. I've had horrible roommates in the past so I can kind of relate. Now that I've been living alone for quite a while, I'm so much happier. At least this will all be over soon. I'd try to do what mrspunkysmom has said so she doesn't get too comfortable in your home and then decide to stay even longer. Good luck.