It's all about timing, and you're in two different places. They may need much more than casual contact with the church to see the truth in it. I believe that there will be a lot more mercy than justice being dished out at the judgment. The misogyny is deep in the Mormon church. It is highly likely that she will pressure you to convert, and if you resist, she may resent you for being the barrier to her being sealed to her children. I told her that I want to only be friends.
No beliefs are protected from challenge, the rules of evidence, or derision. I married someone that wasn't of my faith and it worked great. The Church does not recognize homosexual marriage, and does not condone sexual activity outside of marriage. Good luck with her, and good life to you. March 18, Run for the hills.
What upsets me most is that he didn't realize it was my birthday, or a big one and then that his reaction was to get defensive about his plans rather than offer an alternative for celebrating with me. I'd at least insist that at 12 the kids can choose to disaffiliate. As a parent, we hope our children will make life choices that will give them the greatest chance of happiness. And your future kids will be taught that you are the reason they don't have an "eternal" family. But my struggle is with whether or not he is willing to give anything with sacrifice and commitment, and how much of this has to do with me vs. Every new set in our ward looks at him as fresh meat. Your girlfriend might, or maybe IS, going through this.
My dear faithful LDS aunt married a good non-member man. I know he loves me with all of his heart. You are too young to deal with this. I say to you, decisions determine destiny.