First of all, you need to keep in mind that
problems are a part and parcel of married life. I got married three years ago and it is turning out well though we are confronted with financial difficulties and uncertainties of the future. I have also asked some of my colleagues their reasons for not getting married yet. The general response was that they wanted to avoid a problematic situation. Marriage does not mean you're getting into a problematic equation?
You are forming a bond with another that will bring meaning and fulfilment to your life. Having problems in marital life is a normal occurrence. So a marriage without problems may mean that both partners are living superficially, and they are hiding things from each other. This, on the other hand, could cause deeper conflicts later in their married life.
Another thing you should be realistic about is your expectations you have of your spouse. You should not expect too much from him or her, because ultimately, he or she is still only human. As they say, humans are bound to err. So, if he or she does not do the things you expect, don't end up disappointed and become miserable in your marriage.