An open line of communication is always a backbone of a good marriage. I suggest that you try and talk to your spouse in a way that you will be able to express your emotions and feelings without sinking into the negativity that have caused the problems in your marriage. Get into the bottom of your marriage and tackle the obstacles and issues head on in order to save your marriage.
Also, try to gauge the positives and negatives about your marriage in order to figure out what really needs to be done about your relationship. There are instances that staying together in a marriage is actually harmful because it could breed a hostile environment in which both of you would argue and fight a lot.