As always, here's the link for the lesson on Eternal Marriage in case you need it.
"The Importance of Celestial Marriage" by President Spencer
W. Kimball- Addresses interfaith marriages, divorce, unmarried, and how it is normal to want to be married. The Lord set the norm when He joined Adam and Eve.
"Divorce" by Elder Dallin H. Oaks- Talk about the concept of marriage being in peril then talks to those who needed to be divorced, those contemplating divorce, and those considering marriage so they may avoid divorce.
"Nurturing Marriage" by Elder Russell M. Nelson- Discusses the doctrine behind marriage and three suggestions to strengthen marriage.
"Temples and Eternal Marriage" by President Spencer W. Kimball- discusses the sadness of a temporary marriage versus the happiness of an eternal marriage.
"Celestial Marraige" by Elder Russell M. Nelson- Discusses the The Family: A Proclamation to the World and addresses those not married.
"The Latter-day Saint Concept of Marriage" by Hugh B. Brown (in past First Presidency)- Marriage fulfills God's purposes, brings true happiness, fulfill our needs, allows progression, and is an act of faith.