What Can Happen in Marriage

If only someone would have given me some input that told me what marriage could be like, or maybe some book that could have given me instruction on what to look out for to give warning before the marriage went downhill or when the other person was not right for me. Some sort of instruction manual that could give me an idea what goes on in marriages and what kind of obstacles we might encounter, and does our situation have hope, need counseling or do we just walk away?Is it possible that I w...