Hi, I'd like to help you with your question.
Yes, your marriage can change but your husband has to realize that he has a problem and take steps to fix it.
If you are in a domestic abuse situation, you are in a dangerous situation. It is one thing to argue a lot or to cheat, but domestic violence can easily escalate into causing great physical harm or even death. That is why most counselors and other professionals will recommend your first step be to leave immediately. And you should. If your husband is willing to harm you then he is willing to hurt you to the point of taking your life.
No one should have to accept being physically hurt. Abuse shows that the perpetrator cannot control their own emotions and lashes out to hurt someone else because of their own problems. Abusers will try to blame the victim, which makes it worse. It shows that the abuser has no insight into their own problems.
If your husband is willing to seek help, that is a good sign. Keep working on this issue. But in the meanwhile, you should either have him move out or you move out. Staying apart while you work on this keeps you safe and helps motivate him to work on recovery. Also, keep the phone numbers and helpline numbers nearby or on you at all times in case you should need help right away. Enlist the help of family members and trusted friends so you always have someone to turn to.
Educating yourself about domestic abuse can help as well. Here are some other resources to help you:
Healing the Trauma of Domestic Violence: A Workbook for Women (New Harbinger Self-Help Workbook) by Edward S. Kubany, Mari A. McCaig and Janet R. Laconsay
Why Does He Do That?: Inside the Minds of Angry and Controlling Men by Lundy Bancroft
Domestic Violence Sourcebook, The by Dawn Bradley Berry
You can find these books on Amazon.com or your local library may have them for you.
I hope this helps,