Are there any step-parents out there? It seems to be such a challenging position regardless of any diagnosis!
If anyone can relate, there are so many confusing issues that I wouldn't know where to start- so I'll leave it as question for now. I am dating a guy with a son and we have been together over a year now. The whole situtaion is still very overwhelming and I feel guilty dwelling on it.
Thanks all! have a nice day 
I am a step parent, and so is my husband.

You are right, it is challenging. My husband and I have been married for four years, and we dated for nearly two years before. When we began dating, his daughter was just turning 3 and my son was just turning 8. Today, his daughter is almost 9, my son is almost 14, and our daughter is almost 3 (all three kids have June birthdays).
We've had the typical adjustments to make in blending and building our family, but we have been diligent about confronting issues and finding resolutions that work for everyone as much as possible. It's not easy to do much of the time, but if both people are determined to make it work, and treat each other with respect and patience, it can be done.
I wasn't diagnosed with Narc w/ C until Sept. 2010, so we were not even aware we were dealing with that issue the first two and a half years we were married (actually, it became significantly worse after our daughter was born, for obvious reasons, but it wasn't until her first birthday that I realized that something was VERY WRONG with me

). In a way, we've all become closer as we've gone through the trials of coping with my illness. My complaint is, however, that I can't be involved as I want to be, so I feel isolated and left out, and a burden as well. No one
treats
me that way; I just feel it.
I don't know if this will be of any help to you. I might have suggestions I could give you, if you like.