<human>: Can you succinctly summarize the text in 1-3 sentences?

Ok. So I am a big guy. I wrestle heavy weight and am on the football team. I know I am strong and I sometimes have problems controlling it. She isn't nearly as big as I am.

We were play slapping each other in class. It was kind of us just pressing against each other's face with our hands. Then she starts to slap me harder and in kind I do the same. She slaps me once kind of hard and I slap her not thinking it was hard at all. She gets upset and then asks me why I hit her so hard. I asked her if it hurt and she said yes, then I felt really bad about it. I apologized profusely and I know that doesn't make it better. 
She got mad at me because I told her I would never hit her and I never intend to either. I believe men shouldn't hit women. She also is a little wierd when ever I get mad at her. She looks at me and asks if I am mad enough to hit her. I always say no but I just think that is weird.

Anyway she is now mad at me and I want nothing more than for her to not think I will hit her ever again and not be mad at me anymore. How should I go about making things better?
<bot>: Me and my girlfriend were play fighting. I hit her to hard on accident and I want to know how to make her feel better.