As Joanne mentioned, should you marry interfaith, you will have lots of help from fellow ward members on converting your spouse. Great payback for my support during residency and multiple moves. Or the links, in that first vision one. But the issue of marrying a non-member raises two fundamental problems: That idea seems so contrary to the nature of God. For the first time in my life, at age twenty-seven, I am in a relationship that is good and loving and serious enough that I believe it may lead to marriage. I was definitely taking the "Tough love" approach because I've read countless times on this and other boards, how Mormons claimed that they were cool with their SO not being Mormon, and that they weren't, themselves, orthodox. I would bet this is exactly what she is thinking about you, which is why she is willing to have a relationship with you aren't a Mormon. The point to this story is that when he had any free time he wanted to spend it with me. I don't really care if she's religious or not, unless she brings it up all the time or tries to convert me. We just moved in together and I am very afraid of his ocd ways and heavy opinions.
He is not a member and has told me he is not going to convert. I would show her this recent post for example: Her family will also be thinking about this and will talk to you about it when you spend time with them. He learned that I didn't pick up on ambiguity and that I took it personally when he didn't show consideration for me during the times that it was possible to.