"I, ___, take thee, ___, to be my wedded husband/wife, to have and to hold, from this day forward, for better, for worse, for richer, for poorer, in sickness and in health, to love and to cherish, till death do us part, according to God's holy ordinance; and thereto I pledge thee my faith [or] pledge myself to you."
Love is not something that should have weather. "I will love you forever unless you ____", "I will love you for all eternity except when you___". Love is in health AND in sickness. Not just when we feel like it, or when it's easy. Love is not easy. It is hard. It is nearly impossible-no, I would say it is impossible to love someone easily. It may be easy at first, heck it may even be easy most of the time. But there is not a single relationship where it is always easy to love someone.
Despite that, we need to look to Christ in the times when it is hard, and we need to remember that He loved us even at our worst. He loved us when we were sinful, and dirty, and He was willing to make us clean. We must be willing to see the clean side of our significant other even when the obvious side is dirty. It is easy to see the side that is not so pretty especially when we are busy looking at the good side in ourselves.
What we need to remember is that none of us is blameless, and none of us can do this alone. God gave us companions because He said "It is not good for man to be alone.". He knew from the very beginning that we needed someone to have and to hold, and if that isn't a reason to fight for it, then I don't know what is.
"Love is not supposed to be easy. It is supposed to be worth it."
"What comes easy won't last, and what lasts won't come easy."