Marriage in the temple is no different than any other marriage when it comes to nurturing. It has to be maintained or both will drift apart.
Many marriages are built on doing steps in a certain time than doing it because you're ready. Career, education having economic stability are a must to keep things together. Of course picking the right person YOU want to marry and not the bishop wants you to marry is also as important.
Temple marriages end in divorce, because people are people, they have weaknesses. It takes two to fight to make a marriage work, when one gives up, it fails, and there is nothing the one who wants to work, and do about it.
Marriage and life is about sacrifice, when we sacrifice our will and needs for another, and suffer pain in the process, that makes us Christ like; to return to him someday, we must learn to be like him; which means loving and serving others, no matter how crappy our end of the world seems.
That as a given, there is the problem of the Church, the Temple ordinances and ceremony are not the end of a process, but the beginning, and they are a type of that which is to come; to show the way back to God.
If you have not found Christ personally and developed a relationship with him, and being sanctified by the truths you are receiving from him, the Temple Ceremony will be of none effect anyway.