Don't make church your god. God didn't call us to go to chruch. He called you to be the church and witness your faith to the world. I haven't heard anything in your post that says you are involved in evangalism. Maybe you and your fiancee should go out and do evangalism together, and as you work in the field this situation will resolve it self.
Sounds like your gal understands this, with your faith being the proof. If she is an evangalist, Church house politics will make her very uncomfortable. She will know what a hinderance to what the purpose of believers politics are, which is to seek and save the lost.
Confussion is not of God. Shut off all the voices, listen to what the Lord says, and do exactly that no matter what. If your fiancee is the girl for you from God, then she will follow you. If she don't, then she ain't the one, and is in the way of the one God has for you.
Get with her and pray until you are in one accord.