Abused Wife

My backs against the wall what am i to do? He's come home drunk again to beat me black and blue. I've called the police again they're always on his side, he hides his self so well, he gives that evil grin as my face begins to swell. He tells me he's sorry, what am i to believe? It'll only happen again, I know that i must leave. The beatings are getting more frequent its only getting worse i'm afraid that the next time he beats me i'll wind up in a hearse.