Every place I've lived with other people and not on my own, I've lived with at least one girl. It's turned out negatively almost every time.
First time I took a room in this lady's house; she turned out to be a jesus freak.
Second time I lived with a girl from the gym I trained at; she turned out to be a crazy lesbo (not that I have anything against lesbians, but this chick was off her rocker).
Third time I moved into a shared house with two guys, and a few months later my girlfriend of the time moved into a free bedroom (she wanted her own living space). Turned out bad; we broke up while she was still there.
Fourth time I moved in with a really hot older woman, 10 years older. We ended up sleeping together a few times, and then I started dating a girl who would later become my wife, while I was living there. Weird situation.
There's my experience living with woman. If you have to share a bathroom, all I can say is, well, I'm sorry.