I find it very important to learn to let others make their own decisions.
Many supporters on here (not all, I have realized though) think (and probably truly believe) that they can deal with anything coming up and that they would always stay by your side as long as you keep the lines of communication open, as long as [insert whatever their troubles with their loved ones are re PTSD]. However, there was a time when I told people close to me what was going on, my history, my PTSD troubles, etc. Some I told details, some I did not, depending on the relationship the respective person and I had. To be honest, and you asked for the truth, many left. Many took the decision to not stay by my side -- and I am not talking partners only, but family and good friends. Friends I told all I told them only because I was convinced that what I said could not destroy our relationship. Change it, yes, possible. "Kill" one or the other, yes, too. But not so many.
I am saying this because I think it's part of being mindful towards your own self to be(come) ready for sharing your history, PTSD troubles etc. and be ready for the others in turn taking their own decisions. In my experience, some stayed, some left, some vanished into thin air (that's how it felt) before my very eyes, some relationships changed (because they distanced themselves a little more) and some relationships grew stronger.
I think, that if you have been left in a lot of pain for your own trauma history and if you have faced PTSD basically all your life, you should be careful with putting yourself out there. This is not saying you shouldn't do it; just be very, very careful with yourself, your core, your inner child... Once you allow others to take their own decisions, some will choose to go. And "we" need to be able to deal with that in a healthy way when it happens. Otherwise, I guess, it could be retraumatising.
In my life-long experience with PTSD I have found that there really are people who can't take "it" (the severity of my traumas, the details, even the headlines only... etc.). Every person is different and they, too, (those you know) have their own histories, their own losses, their own troubles -- and thus they have their own limits of what they can take. Some supporters say and probably really believe that a person with PTSD should just talk and let it out. But it's not that simple. I think, they need to look at themselves first and they might want to respect themselves more, as the people they truly are. We're all just human.
When I was younger, and about to get married, I thought that my marriage should be the place where I can let it all out, just as he could. I don't believe that anymore. I have made the decision that for me with my history and my life and me being me, I want to not blurt out the details anymore. Also, I have decided that I don't want to voice all symptoms I have. .. This is hard on me, but true all the same. Today, I think that a relationship needs good times, vitally. And I personally suffer a lot in daily life. But if I focused on that, I'd be suicidal in no time. So, for me, I have found a way to deal with my trauma history and the realities of my life, then and now, and I am making sure to keep those relationships I have going and being well by not sharing literally everything.
It ensures that my relationships, those I have, work well, and are not centered around my trauma history and my PTSD. I think, it also has been key for me to not end up in full-blown depression; I deal with things in MY ways, in MY time; it is how I can actually have a life that I consider a life, and not survival.