I’m gonna go out on a limb here. I don’t discount that supporters have a tough challenge on their hands with being involved with someone who has PTSD. However, your wording of ‘you choosing to be with someone with PTSD’ makes it sound like she should be thankful someone is tough enough to wrangle her problems. You choose to be with a person, not their affliction. While she may be sufferer, relationship is about compromises because I can assure you she’s probably had to adjust around your quirks as well. With a statement like that, it seems you’re expecting some appreciation to the level of this ‘choice’ you made to be with her. You’re gonna be disappointed.
Right now your partner has asked for space, this means that something in your dynamic is currently not giving her a sense of comfort. Whether it’s irrational on her part is irrelevant.
Right now you should be taking the time to reflect on your communication skills in the past with your sufferer. Can you make changes? Is there anything that could have been handled differently.
Example: Us sufferers are notorious for random moods, you as supporter ask if we are ok, we deflect. ‘Yeah I’m fine’. Do you leave it at that and wait for her to come to you when she’s ready? Or do you grill her because you know something is wrong and deflect it back on her as not caring about you because she won’t share?
Do you make it a point to discuss her issues when there isn’t an issue or any reason to bring it up other than curiosity, or do you deflect her irritable withdrawn behaviours back on her PTSD? Some of the beautiful amazing women in my life suffer very irritable behaviour, discomfort and physical changes, absolutely nothing to do with mental health issues, just that time of the month where nothing needs to go any further than ‘is there anything I can get you to make you feel better?’ End of story.
As I said I’m not accusing, I’m just giving you a chance to see that you have an opportunity to reflect on your behaviour as well. It’s also a good time for you to evaluate if this is worth your chosen investment.