You were uninformed about PTSD, you were not naive. Please don't add that to your pain of all that has transpired. Used? I would say no to that because you are making strides to move forward.
We all understand your wanting to make sense of this. I know this won't help, but those of us with PTSD can't make sense of things either sometimes. Not without a lot of therapy, a lot of exposure, a lot of blood, sweat and tears.
I'm sorry he hurt you with such callous and thoughtless words. But now you know. Still proud of you for reaching out and trying to find answers. I know we didn't tell you what you were hoping to hear. It's hard, very hard to be in a relationship with someone with PTSD. As much as this may not make sense to you, I'm grateful you don't know what it's like.
Wishing you good healthy healing and a wonderful future relationship where you will be valued for simply being you.