OP here. I presented all of this to a counselor pretty much as stated in my post. I have been seeing this person for a few months now and we have discussed this before but never really explored the possibility of being a pathological liar before. I gave her the opportunity to question anything I had told her before with a 100% promise of 100% honesty regarding the truth or falseness of anything I had ever said in our sessions and was surprised when she nailed me on a few exaggerations that I didn't even consider as falsehoods, just stretches to make a point at the time. We are "on the level" and she states emphatically that I am more worried about my lies than I should be and am far from being pathological.
And, to add to the conversation here, I want to pass on her opinion of how PTSD and lieing do go together, at least for me.
Admitting that we are suffering from the traumatics events of our past is hard, but admitting that we had no control over our own past is another level of hard. Telling ourselves lies about why things happened is normal for sufferers, sharing these lies with others is also common. Those are the lies I told her in sessions past, lies about how I knew events were not my fault but in reality I was holding on to the idea that I had some control over my life back then and wasn't going to let go of it. Holding on to blaming myself was a lie I told to cover the fact that I was unable to stop my abuse and totally helpless to avert the damage suffered.
My daily lies are designed to try to fit in and contribute to a group discussion that isn't the discussion I would be having or the group I would choose to be in. I lie to fit in, not to change who I am or to try to make myself anything more than I really am or more than the people I am lieing to. If I had a choice I would be in a different group and I could be 100% honest all day long, but thats not a luxury any of us have.
Basically, we all lie to fit in. Do you wear deoderant? I hope you do, but no one really beleives that you smell like a mountain breeze any more than they believe that you are truly great even when you say you are when they ask you how you are doing.
I need to accept that I have a habit I don't like, that it is a common thing and not at a disorder level, and I need to quit beating myself up over this and about a thousand other things. This is an easy one, I can choose to continue or choose to stop, or just choose to be aware and make my peace with it.