While the Church allows dating at 16, it discourages serious relationships until you both are older and considering marriage. Don't expect this to be like the others. I have no support system; you are so fortunate to have weekly dates with your DH. No one knows your situation the way you do.
Yet others are really great human beings. She's most likely secretly playing out fantasies of converting you, marrying you in a Mormon temple, and having a very Mormon life, OP. I completely agree, but I think the critical part is that he needs to talk to her. That response made her very happy.
To others making this consideration, I would certainly suggest that you converse with your Father in Heaven about this important choice. I was the bishops' daughter who went to BYU but didn't go on a mission because I was already married with a 10 month old by my 21st birthday. If you have tended to straddle the line between light and dark in the past, or have been a partier, expect to make some changes for this relationship, and expect certain things from your new crush. Several of the apostles have grown up in part member homes. She went to BYU and did a 2 year mission, but since she was a girl she got to have a car instead of a bicycle. I would come back from one of our weekends together and they would ask how it was and I would talk about how amazing it was and what all we did. Our communication is almost gone to none, he needs a lot a lot of alone time to achieve his career while i am really worried that how much longer i can live like this!!. The point is that there are way too many people talking in this thread as if they have some sort of psychic knowledge a stone in a hat, perhaps. Mormon girls are taught that they have a divine nature. You are too young to deal with this.
Of course she won't want to watch something that in her mind attacks her religion. Sometimes I wonder if it's "Better to end it now and cut off the limb and let the stump heal". There is no way she will may you without you going to the temple. I say, Follow your heart. Thank you so much for your honesty!. There is no question that God loves all of His children, and that obviously includes non-members.