Matt 18:18 - Binding a family on earth as well as in Heaven.
Matt 19:5-6 - Marriage is forever and we should not divorce.
Eccl. 3:14 - God can bind our family forever.
Heb 13:4 - Marriage is honorable.
D&C 49:15 - Marriage is ordained of God.
Gen 2:23,24 - We become one when we are married.

Marriage and family relations can last beyond the grave. Would it make any sense for a loving Father in Heaven to setup the the family unit to help us spend a lifetime together developing that love and relationship just for it to end at death? Of Course not. There are two types of marriages here on earth: A civil marriage "till death do you part" and a Temple Marriage "for time and all eternity".

This site is dedicated to the preservation of families.
The Family: A Proclamation to the World