Me too Brother. That was a long time ago that I slapped that girl. I didn't hit her in anger, mine was worse I think. It was calculated. I came to a point (remembering that a pop bottle parted my hair) that I thought...if she does it again, I'm gonna knock her on her butt. And she did.
I already knew that I wasn't going to stay with her, but like has been noted already, sometimes it does take time to do it completely. She was the persevering type shall we say? lol. (She stalked me for two years after that!)