I can be part of a church family whether my spouse goes or not. The "loneliness" is not an issue for me. Pretty alarming how unsophisticated so many presumably well-educated people's expectations are of marriage.
Dating a resident is hard - it was hard to realize that I can't come first, or even second, in this relationship right now. They are taught to refrain from smoking, drinking, or experimenting with drugs. I wanted to be able to fully share my faith with my spouse, but this expectation was now up in the air. I'm keeping myself occupied with my kid, work but I wonder if my career will ever take precedence. It has been closed. Be open to the wisdom the Spirit will share. Think of every possible scenario you can think of. Make up stories about being a soldier at war or a sailor at sea keeping me away from my love. I don't see anywhere in your post where there is a complete commitment.
That means that we are always changing and growing. It just gets so lonely you invariably commission yourself a single parent. My parents, siblings and grandparents are all active members; as am I. And once you are done with those, ask about social issues and where she stands. I cooked every meal…… My husband went to work…being a god to his patients.
I have missed anniversary dinners, birthday parties l, Christmas mornings as well as day to day. In the interfaith marriages that work where one is LDS and the other is not religious, it only works out when the LDS partner is not fully a believer anymore. They might be disappointed, or overjoyed, or judgmental, or supportive. By all means, I encourage you to try having those discussions and to make a mental note of when you would choose to walk away instead. We are indeed in two different places.