I agree with the above PP’s who said to talk to the DA. But I’ll also mention… seriously don’t let yourself become any more involved with this person. This is coming from someone who’s dealing with heartbreak after getting a restraining order against an ex who put me in a similar position. I know how hard it is to truly cut ties when you’re emotionally attached. Be kind to yourself and take care.
At this point, you should have gotten a whole lot of gone between you and him. I am not surprised that this wound up being a domestic violence case. You are lucky that it wasn’t worse than it was, and you can count on it happening again if you stay with him.
Better late than never - get a whole lot of gone between you and him. Right now.