Hi Fearful,
Welcome to the forum and to recovery from lying addiction.
Although I am not a lying addict (simply someone who researched the issue of compulsive lying in great depth), I am a recovering alcoholic - funnily enough also 15 years sober!
Jmaneyapanda asked the bottom line question. Where you are within that question will determine how much you embrace your recovery from this horrific and debilitating addiction.
Lying addicts believing their own lies is very common with lying addiction so don't worry on that front. Here is a post I did on the day to day life of lying addicts. I am sure you will see yourself in the words here...
compulsive-lying/topic129187.html
I suppose co-dependency within the context you are speaking is a part of lying addiction but primarily it is about low self esteem and people pleasing in general as this post I wrote highlights...
compulsive-lying/topic115788.html
Here are some tips, tools and techniques to help you stop lying... They will work if you work them...
compulsive-lying/topic116107.html
When you are ready to come clean, here is a post I did on how to do so responsibly...
compulsive-lying/topic116108.html
Keep coming back.
Big Hug,
Billi