A very big step to take is to admit it, to yourself and to others. This step you appear to have taken, at least with us on here.
It doesn't matter what the repercussions are, be they marital, kids, financial, if you on the receiving end of violence things won't fundamentally change until you change them.
Forget the apologies (if there have been any), the begging for forgiveness and all that. The offending party must be made to see and realise the consequences and effect of their actions. I don't just mean seeing you in plaster and slowly healing. I mean 3rd party intervention. If you can't face the involving the law, even at this advanced point, then you should immediately seek the assistance of professionals who deal with this kind of thing.
Others have suggested organisations to contact. Do it. It isn't just about you, although you appear to be on the receiving end. It is about both parties getting the help they clearly need.
If it means the end of something, then thats what it has to be. Something is very wrong and plates and plaster can't fix that. We don't know all the facts and we don't need to. But you need to take the further steps to ensure your own safety first.
No Hits, No Hype.......................Classic Rock Jan 2012