Patriarchal leadership is something that most women in the world valued until recently, but it is still a chief value with Mormons. 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. Let's talk about kids. Talk about issues with Jehovah's Witnesses etc. I used to be religious when I was a kid.
I feel like I am under the microscope. All of which will remind her that she wants you to convert so you can be together for eternity. Joanna mentioned that our theology is rich with opportunities for second chances. The essay on race and the priesthood claims that Brigham Young prophesied that blacks would receive the priesthood someday, but if you actually follow the link in the footnotes you will see that he was misquoted. She was expecting me to break up with her, like all previous guys she's been into have done. It doesn't help to know that he is terrible at being alone.
On top of this we are going to have our first child on April 12th and I feel very alone. I think she sounds great but she won't be able to not bring it up. There are a million fish in the sea and it makes no sense to choose one with whom you are not religiously compatible. I don't think you should abandon the relationship just because she is lds.
You should take all of the above advice to heart and follow it just in case, so you can make a smooth transition should it ever be necessary. You I think are ok with that. Fall in love, learn, make some mistakes, laugh, serve other people, reproduce, and let the whole story start again.