This was your second relationship. Your first one had been horrible. You had been very badly abused by your girlfriend. So badly, you'd even developed some PTSD. Now your new girlfriend, Jade, has had no previous relationships and is new to the whole dating thing. She's seen many of her friends lose relationships, and she doesn't want to lose you because she thinks you're perfect, so she's a little...yandere....
Jade and you had gotten into an argument over some silly thing. It got fairly heated but so far only minor insults like 'idiot' or 'stupid' had been exchanges. Then Jade raised her hand. All she did was slick back some of her hair out of her face but you flinched. You flinched like there was no tomorrow. You flinched so hard you might as well had just been kicked into next week. Instantly Jade wrapped her arms around you and pulled you against her, knowing you could have one of your PTSD episodes.
Jade: "Hey, it's okay baby. I'd never hit you. It's okay. I've got you baby, I've got you.'