Nerfus, I'm so sorry to hear that your W has hit you again. I'm not sure about the whole domestic violence thing as I've never experienced it first hand. I'm not sure how calling the police will help your sitch but on the other hand, you don't want it to get any worse.
I can relate to what your family and close friends are telling you. Mine are basically telling me the same thing. What I've done is told them that I am going to be working on my M and I want their support but their negative views of my W and my sitch are not supportive. Basically, if you can't say anything nice, don't say anything at all.
I wouldn't worry too much about her trying to kick you out. I'm fairly sure she won't be able to get any grounds to do that. I would definitely go see a solicitor if I were you though. The first session is normally free. When I went it put my mind at rest. My W and I are still fairly amicable with our separation though.
The way you're describing your W suggests to me that she's having some kind of mental issues. I'm not sure what you can do though if she won't even admit that she's got a problem.
Try to keep your cool as much as you can mate. We're here because we love our W's and want them back. Keep on posting and you'll get a lot of good advice from people who have been here for a while. We'll all get through this somehow. Good luck.
Me: 32, Wife: 22 Son: 2 Married: 2 years Separated: January 5th 2009
Sometimes you have to become lost before you can find yourself.