And your future kids will be taught that you are the reason they don't have an "eternal" family. The first key question to as is: If the answer is yes then the relationship sounds like it's doomed.
I wanted that full support though I am certainly not saying that marrying a Mormon ensures that.
That isn't fair on you, and again will create stress and a stress point in the relationship. He will eventually have more time for you, but right now he is likely giving you all the time that he can, even though it is very little.
And if he meets it's after calling him for the several time. This came about after many hours and many days of prayer, scripture study, going to the temple, receiving a priesthood blessing, and speaking with people I greatly trust my mom, especially.
By the time you are done, you'll have all of the basics down and will have the framework to know what to ask next without any confusion.