I admire your courage in bringing this issue forward. It sounds horrible. This abusive relationship has put you in a powerless role. Let’s see if we can change that.
I think we need an immediate AND long-term strategy so that the process does not overwhelm you.
Let me discuss the more immediate future. The next time there is anything abusively physical between the two of you go to the hospital for treatment and file the police report from there so there is corroborating medical information. Explain that you are afraid to go back and your reasons. Most hospitals have a social work department that can help you coordinate the protective changes. In many areas this can include housing.
I would immediately encourage you to begin creating a support system to help with the changes you want to make. Here is a connection to an online community for Codependents Anonymous
and to find ones in your area. Of course the PsychCentral forums are available 24/7/365 for your support as well.
Codependency happens whenever our lives are in orbit around someone else. I strongly suggest these meetings both online and in person because the more support you have the easier it will be.
Finally, I would make arrangements to begin therapy. If you don’t have enough for a private counselor look into the clinics in your area that have sliding scale fees. Most community hospitals have an outpatient program with s sliding scale.
To make and keep these changes you will want the support in place.