Ok, before everyone starts shouting abuse and how I should turn myself into the police, you need to know the whole context, and understand that it was entirely an accident.
You may or may not have read the thread, but I'm the person who hates having their neck touched ... and my girlfriend likes to touch and kiss my neck. So, in order to get over this, we were trying something where I would be totally relaxed and trusting of her, and then she would slowly touch my neck to see how I'd respond.
So, I was trusting and relaxed. I was so very relaxed, I was in a completely different headspace and, to be honest here, I forgot she was there with me. I even forgot I was there. Then she touched my neck, and brought me out of it very suddenly...
I really did just act on instinct and, in an attempt to get the 'attacker' away from me, I hit out ... and caught her. It was only after that that I even remembered it would be my girlfriend, and as soon as I realised I was stroking and kissing where I'd hit her, getting the ice, cuddling her and apologising.
She said she was all right with it and she understood I hadn't meant to violently attack her, even that she should have gone slower and not taken me by surprise.
However, since then, she hasn't responded to my texts or be as active in conversations, she seems jumpy around me, she was hesistant to get in a car with, she doesn't sleep half laying on me anymore...
I don't know what to do - I really didn't mean to hit her, and I love her so much ... but I think I've scared her, and I'm probably one of the most non-violent people you could meet. Is there anything I can do to make it up to her?
TL;DR version: Accidentally hit my girlfriend in circumstances that are IMO completely understandable. Not a violent person, but now she seems scared of me - anything I can do about it?