The very clearest explanations of how Aspergers Syndrome affects a relationship with an NT partner are found in Ashley Stanford's book "Aspergers Syndrome and Long-Term Relationships." That was my Aspergers bible when I started this journey, and I strongly recommend every NT who is in any sort of relationship (but particularly a romantic one) with an aspie, read that book, even before reading any others. It simply hits the nail on the head for the NT partner who is struggling to understand the crazy AS/NT journey (that now finally has a name!) that she has been on.
When I recently stumbled upon a new book by Ms. Stanford, I could not wait to purchase it. Troubleshooting Relationships on the Autism Spectrum: A User's Guide to Resolving Relationship Problems by Ashley Stanford.
Hope these resources help you as much as they have helped me!