Hi Mark,
It would be impossible to give you specific feedback about why you are behaving the way you are because I do not know you. However, I can make some general comments that hopefully will steer you in the right direction.
For those that may not know, PTSD can cause a lot of problems in relationships because the person suffering from it tends experience a lot of guilt, fear, confusion
(among other feelings) that manifest themselves in a lot of areas, not just when things related to the trauma pop up.
The bottom line is that you should seek some effective treatment for your PTSD. Eye Movement Desensitization Reprocessing (EMDR) is appropriate for some people to become free from disturbing events from the past. When we have disturbing events that occur, they can get "locked" in our brains with the original images, thoughts, feelings and body memories. EMDR, which is believed to be similar to what happens during our dream sleep, helps to "reprocess" these experiences and to be free to engage in new behaviors that were previously difficult.
Cognitive Behavioral Therapy (CBT) will also address PTSD, but in a different way than EMDR. I am trained in both metnods and actually prefer EMDR for processing a trauma because one does not have to "immerse" themselves into the trauma with the EMDR model like the CBT model demands. Rather, you "ride through" it while protected (as if you were riding on a train watching passing scenery) in the present moment.
If you are not ready for therapy, one of my favorite self help books is entitled, Growing Beyond Survival: A self-help toolkit for managing Traumatic Stress, by Elizabeth Vermilyea, M.A. This book will give you practical tools that you can use to change thoughts and behaviors related to PTSD and therefore approach life and relationships in a different way.
I hope that helps get you started,.
Regards,
Jennifer L. Fee, Psy.D.
The Stress Masters