Best ways to find roommates??

Anyone know of any good sites to match up with roommates? Unfortunately I have to many bills to live on my own close to work. I currently have a psychotic roommate that unfortunately I can't get away from till our lease is up in August. I can't afford to get out and find somewhere else. I haven't had any luck with roommates other than my SO but he's going back to school soon. I need help before I land my self in jail or a crazy house for loosing my sanity and thats not exaggerating. I've been patient but she keeps attacking me and I'm done.