Reply #31: I have been in a situation where I couldn't afford to move - and having a dog makes it harder

[LisaM]

I think you need to ask your landlord not to renew the roommate's lease. Then once she's gone, change the locks.

I've never seen a situation this bad, but I've seen roommate situations over the years where one person tried to make the other person feel like a visitor in her own house (my sister had a roommate like this). There's something wrong with people like that.