AlmostNotQuite- first, welcome to the forum. There is a lot of wonderful information here.
I believe that this thread in particular is a real frustrating issue for a lot of the members for that reason- Like Meadowsweet, most of us/we all believe deeply that a diagnosis (and second opinions) are necessary to determine PTSD. It is not a one size fits all condition, and too many people have things that have happened that they want to categorize into an official diagnosis because they do indeed have a condition. Just not PTSD. And seeking professional assistance in getting a diagnosis is required.
But, I, like you have said that it is not for me to decide. You do what you can, you point them in the right direction, and you softly shake your head from side to side when they are gone. But what can you do but go along to get along?
I would never accuse a person of faking it however- if the diagnosis has indeed been made. In the case of a self diagnosis, well, then they simply do not belong on this forum. I am sure some have self diagnosed with success, but it is not the way to handle it, but that is just my opinion. While I do believe that some have been misdiagnosed, I also understand that the brain functions in different way in different people. What one persons sees as trauma, another does not, and vice versa. We do not know why, science itself can not even account for the why to this. It is what it is.
I did deny it. When I was initially diagnosed as (clinically) depressed some years ago now, I thought "No way". Well, ok, I was depressed, but to have that diagnosis, it just somehow made it too real. I wanted so much to be- well I didn't want to be anything else either, except for possibly normal. I eventually moved on from denial, and found that phase of acceptance. I went through therapy, group therapy, medication trials- nothing helped. Nothing.
And then I decided to switch medical groups- I went back to my previous physician who specialized in trauma. He is the funniest little italian guy you ever did see. I remember after I had a really terrible motorcycle accident- when I finally did wake up which took quite some time- of course they ask you all sorts of things, what is the date, what day is it, who is the president, etc- I couldn't answer a single one of them correctly- And my Dr. comes in and asks how are you feeling, same questions that I had already been asked, and before he could finish asking me I interrupted him. Rather rudely I admit and said, "Dr, ________, I don't need to know who the president is, I only need to know, when can I ride again?"
His eyes- I will never forget the look. He shook his head at me and said- "let's just get you out of this room and into my office where we can discuss it then." - I went back to this doctor who had been forced to deal with my rather wild ideas of survival- but he had seen the result of one of my traumas. He was the one who did some screening, and then he sent me to a trauma center- and that was where I was properly diagnosed- but it took me more than 4 years to get the diagnosis.
Again, I told myself- no way. No, not me. I am tough, and sure I have had some trauma, I have been through some really very difficult times, but I have also been through way less than other people who do not have PTSD. I have studied this very topic, I know how bad some peoples trauma can be. I am just sad. There is nothing wrong with me, only the people around me.
But, I did go to another trauma center, not even in the same state as the first and received the same diagnosis. For me part of accepting it had to come from not one, not two, but multiple confirmations of the diagnosis.
So- in conclusion- I am in the same boat as you. I didn't want this, do not want it, yet I have it. I will not show a lack compassion for a person who has it (and has been diagnosed) and responds to it in what another person might call a different or unusual way. You can not make sense out of something that simply doesn't make any sense. PTSD or just people, neither make sense when they are put together.