I'm afraid Mandi has the measure of it. Believe me the police are short on patients at the best of times. Go to them with this and they will probably laugh (if they can be bothered) then throw you out. Apart from bad language you have nothing to report. Unless you want to cause trouble for your flat mates with the BF thing just to get back at them. But even then I am not sure how interested they would be in the matter as it would mean them having to do some investigating.

Time to pack up and move on I think. It is my belief that this is not going to heal in time. Even though you are innocent, I doubt (unless the culprit is caught) that you will ever be treated the same again. Find yourself some new accommodation, and some real friends.

I hope everything turns out well for you ;)