My girlfriend is scared of me, what can I do?

Long story short me and my girlfriend were having a playful wrestling match. You know that hole "I am stronger than you!, "As if I will show you!" while we are both laughting. As we were doing it I think she realised I was holding back and she asked me to use all my strength.
I didn't want to do it because I like to have playful fights with her and I didn't want it to end fast. She insisted and began putting all of her strength into it. I didn't wanted to lose to a girl, ya ya I can hear you judge me over there but yes I am that guy, besides she asked me to so I comply.
It was over after 10 seconds with me pinning both her hands down on top of her.
She was shoked. She had no idea the difference was that much. Now she doens't fight with me anymore and even sex isn't as rough as before.
Like she needs to be careful around me now
Like she needs to be careful around me now
She is scared of me! I feel guilty and the last thing I want is my girl scared of me! She can be scared of everything but me! What can I do?
My girlfriend is scared of me, what can I do?
Post Opinion