There's no use denying it, sometimes marriages have troubles. There are a variety of things that can and often does go wrong with a relationship. Sometimes, it can be as simple as one feeling unappreciated or as complex and heart-wrenching as infidelity. Either way, marital problems must be taken care of as soon as possible so that they do not destroy the marriage.
When your marriage is in trouble, the first thing you have to do is admit it. Don't be in denial when you have the best chance of fixing your problems- the early stages. The next step is to talk with your partner and find a solution to the problem, even if that means seeking outside help. Always remember, a conversation goes two ways. You need to talk, but also listen to your mate. If what you want to do is uncomfortable to your spouse, keep working until you find some common ground because problems won't fix themselves, and contrary to popular opinion, one mate sacrificing everything won't fix them either.
Remember that your marriage is important. Work on it like you would everything else you deem important in your life. We will stop eating various things to get in shape for a competition, we will run several miles to lose weight for a swimsuit, we will stay up all night listening to a friend talk about their problems, we will save for years, fully committed to getting that dream home, but most of us run away from our relationships at the first sign of trouble. We shouldn't run away, but run to it by being just as or more committed to it than any other entity in our lives.