I haven't read all posts (just yours, mix) and would just like to comment on this, because, in my view, it doesn't get enough credit, generally, on here:
With counselling, support and a positive attitude [as in: actions],
some things are possible.
as opposed to:
With counselling, support, and a positive attitude, anything is possible.
I'd in no way suggest to throw everything you know about "normal" relationships out the window, as that is pitch black. I'd also not believe in what you said in your quote as that is an innocently bright white -- I'd suggest looking a bit more at all those shades of grey and colors.
In my case, with almost 20 years of therapy (on and off; in Germany, we have to take a break of two years in between what we call "long-term therapy" (around 80 sessions)), I can say that a lot is possible, also with regard to behavior and beliefs in/of relationships.
I think, sending a text to let another person (especially one who is important to oneself) know the basics, or an e-mail or a short phone call or a short talk in person has to do with basic respect for another human being, and not with PTSD. I learned that at 19 during my first long-term therapy. Ever since, I would tell my now ex-husband, friends, family, etc. WHY I was doing what I was doing, and, in terms of what goes as withdrawal on the forum, how long I was gone and that if I needed more time, I'd let them know. I would usually have a mobile phone and be reachable, but would also turn it of when I felt I needed to. Which didn't stop me from getting back to them if someone called or sent a text.
Having sad that, as far as I know, you have now arrived on day 3 (or 4, depending on where you are) of you and her not being in touch. That is not necessary withdrawal, but I understand to be life. I know quite a few people who don't feel the need to be in touch 24/7 and they are content in their relationships (they seem like it and say so). Three (or four) days CAN be the beginning of withdrawal, but they sure can not be taken as such yet. There are many people out there who don't have a mobile phone. They have relationships, too. :eek: :D
I sense from your posts that you are very close to codependency, at least on an emotional level. I am grateful for you that you are seeing your own therapist. I am saying all this in the light of my past, which includes codependency. It isn't a lot of fun.
Best wishes.