This insecurity is at the root of the princess syndrome. Here are my thoughts as someone who grew up with a non-mormon father and as someone who married a non-mormon girl. Right off the bat, I have to admit that being married and committed to our marriage has been of utmost importance for my husband and I - throughout all of his training.
They don't want to accept that someone can understand the doctrine and choose to reject it. If you can't do that, realizing that your partner may never come around to your side of things, you are not ready to marry this person. You'll have to get use to the running late, the tire man, weeks without communication, dinner alone, and unanswered texts and phone calls. If she can see that YOU are what is important in the relationship, not what you or she believes, ya'll have a chance. Why Mormons don't hate gay people. Now it's easier, as they are older, and he's making more time for them. I agree she should be able to watch a movie or do her own research. Mormon girls are taught that they have a divine nature. If your heart longs for children, a family and love- why should you stop yourself holding out for some mystical Mormon man to swoop you off your feet. Do you really want to wait two years to enjoy sex, fun, happiness, intimacy with someone.
To others making this consideration, I would certainly suggest that you converse with your Father in Heaven about this important choice. That being said, we have built something beautiful and good, have modeled loving responsibility and accountability to our kids, and I am certain I am with the man God chose for me. Have those candid conversations with HIM, ponder, and listen closely for the guidance of the Holy Ghost. This is crunch time and years worth of effort are on the line for him. Fist year wasn't easy as he didn't match, I moved across the states and our honeymoon consisted of moving. How can I be more supportive. She went ahead a married a non member.
In the end, God is a just God. When my wife and I married, we were very different, but I found all the differences delightful. Having said that I'm not looking to get married any time soon, so no. I would never convert. His dad and siblings are also doctors, hence his mom is quite use to the idea of being alone and independent. Even if they don't see him that often they know, and I know that he Ioves us so much.