Marriage is an institution where two people unite together to give happiness & make joyful life for each other. Hoping they will be dedicated for one person entire life but after sometime they realize their expectations are not being met & are not happy in this marriage. Some talk about it & resolve the issues but some keep it in their heart for years & then one day they say I had not been happy in this 10 years of marriage or 18 years of marriage. Other spouse fails to understand if the spouse was unhappy then why he/she was in this marriage for so many years. These kind of issues are not to be the reasons for separation, If you are unhappy or expectations are not being then you should seek help of counselor who can guide to both of you a new way to communicate your feelings.