If you can, do it now. Please start another thread and continue the conversation. You can have all the time in the world and not be committed. I think in most situations its either you join or she leaves- either you, or the church. I would think that a comprise between you getting missionary discussions and her reading the CES letter would be even. Thank you for pointing this out.
It's unfair to assume that she feels that way without asking her. It does kick your butt!. In the long run, being married to a nonmember has made me a better person.
What would your relationship look like if you were to marry. I don't think anyone here intended a dismissal of the girl as a human being by stating such. And when he's working, you should be able to connect somehow. Take your date to a club with loud music and an open bar, or an R-rated or violent movie, and the prospects of it going well are daunting. They seriously have movies about it. Anyway, we've discussed marriage already. She ends on a positive note: You are a flawed and unique human being, with excellent training and an admirable sense of purpose. Divorce would have wiped him out and he would not have been able to ever stop working. I had some idea of his life at the time of wedding, but this is tough.
Response to your edit: Do NOT bring up or mention anything that could be considered "anti Mormon. Today, at my ward sacrament meeting, in the back section of the chapel where I was sitting, all the women except one were Mormon wives in interfaith families. They want a man who has navigated the stormy seas of the world, who has just a little bit of history, and has overcome the degenerate worldly culture, a man who has discovered for himself where peace and happiness lie. God will help you both work this out. As these are probably the two most important things to you, it will most likely, be a very difficult decisionвfollow your heart and the spirit. All in good time, my dear. But you can't make her think about the numerous facts that disprove Mormonism.