Yes, your hurt is understandable. But can I be honest ? I am so glad he is HER problem now... He doesn't sound like somebody you need right now.

I don't understand about why you can't move out? Why can't HE be kicked out...?
Whatever it takes, do it. A doctors note saying this is not a healthy place for you, if this is public housing, that should do it (it does in my area). A notarized signed statement ft you (better yet, signed by both you and him) that you are no longer a couple might also help?