Pray about it and follow your heart.
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. Most couples who are married where one is a Mormon and the other isn't, usually stems from a situation where they both were married in the temple, then one of them lost their faith sometime after that.
If this happens, it might click something in her mind that says that what she experienced was pleasurable and she would like to have it again.
I learned, growing up, that very principle, that you HAD to marry a member or your marriage was doomed.