I don't know if this will help
@dcb2410, but there is really nothing 'rational' about PTSD. Nothing. It doesn't make sense to us that have it, much less to people who want to be part of our lives.
Your partner was triggered. You may never know what or why. Someone at the grocery store could have done the same thing to her. But she wasn't in a relationship with them. And you are hurt. We have never minimized your pain.
What we will keep saying to you is this... the only thing you can do at this point is to try and find ways to heal from this pain. You will never find a RATIONAL reason for her choice.
It made sense to her. And if you really love her, then at some point you will know it is time to let go. And yes, it will take time.
I do 'irrational' things every single day, according to the society I live in. In my private PTSD world, it makes sense to ME. You will never understand that because you do not have PTSD. You may learn to understand PTSD, but not always the individual that has it.
Just as she needs to get help for understanding herself and her choices, you will need to find a way to understand yourself and the choices you are making.
I feel I can speak for us that have PTSD, we do wish you the best on your healing journey. You have to focus on you. We can't put it any more plain than that.
@dcb2410 I want to ask you a question. You don't have to answer me or anyone here. Just something for you to think about.
Why are you getting upset with US? Whether we have PTSD or are supporters?
THIS seems irrational to ME. Sorry, not trying to hurt your feelings here. It seems you are not hearing what we are sharing with you. What do you need from us? IF you can get clear about that, maybe we can help.