Hi Bob,
For whatever it may be worth to you, here is my christian perspective on your situation. When I met my wife I was an ex-Catholic confused hedonist. My wife was a born again christian. We became friends and I started to become interested in G-d. It was very apparent to me at the onset that my new interest in religion could easily be confused with my feelings for Elizabeth. With Liz's advice and my own common sense confirming, I found my own church and attended it alone. I made my own christian friends seperate from her. It helped me to figure out what I really believed in without romantic distractions. Now, that said, You and your fiance, in my opinion, based on the Bible, as interpreted by both christian and jew, should not marry if there is not 100% agreement about the things of G-d. The only hope any marriage has to succeed is with 1] absolute, willfull commitment through ALL trials and tribulations e.g. NO DIVORCE option and 2] a shared relationship with G-d as the glue that holds it all together. If you love this woman, go figure out ON YOUR OWN what you will do about a great magnificent G-d in heaven. If, after some time, you truly desire to get as close to G-d as possible, then proceed with marriage. If not, don't trip up her journey. I hope this helps.