I know how you feel. With me, it's mostly just "refusing" to believe I have PTSD. I lock up all the bad memories and the fears and the negative thoughts in one small corner of my mind and replace them with positive thoughts like "I'm doing just fine" and "I don't need any help, I can just push through life myself".
But once in a while, all of those negative feelings force themselves out of their "prison" and fill my head again, mostly in the form of fear. Then I'm once again terrified of the man walking too closely behind me, and I can't sleep because I'm reliving all of those repressed memories.
It's in those moments that I once again realize that I do have a problem and that I have to take it seriously. Because no matter how hard I work to repress my PTSD, it will always come back, and with a vengeange too.
Does that sound familiar?
Anyway, what I'm trying to say is that trauma doesn't just disappear if you talk about it a few times. It just gets more accessible for processing, which is a good step, but it's not the finish line yet. I believe that in order to really get better, and yes, I do believe we can, we have to really open up our minds and slowly and gently reprocess our trauma(s). I like to see PTSD as a bug in a computer system, which causes your brain (the computer) to crash. In order to get rid of the bug, you have to do more than restart the computer; you have to find it and fix it, so that your brain processes can run smoothly again. And that takes a lot of time and effort. But it's not impossible.
Hope this helps