Families are very important to our Father in Heaven. If they were not important, why would God command Adam and Eve to multiply and and replenish the earth? (Genesis 1:28) God could have created more people like He created Adam and Eve, but he wanted them to have the opportunity to be parents and to learn and gain by experience Christlike attributes like sacrifice for another, unity, love, and other attributes. Heavenly Father has given us direction to what we should strive for our families to be like in a document called "The Family: a Proclamation to the World" given to the Prophet Gordon B. Hinckley and the quorum of the twelve Apostles in 1995. In this proclamation, we learn the importance of families and the best way to have a happy stable family; something that is impossible to gain by ourselves without divine help.
There is a quote that I learned growing up that says "We are not put on earth to see through each other, but to see each other through". This can be put into action in a family that is striving to return to God together without leaving member behind.
But how do we get our own eternal family? I believe that Elder Robert D. Hales explained this the best in his talk "Meeting the Challenges of Today's World". "The track that leads to marriage passes through the terrain called dating! Dating is the opportunity for lengthy conversations. When you date, learn everything you can about each other. Get to know each other’s families when possible. Are your goals compatible? Do you share the same feelings about the commandments, the Savior, the priesthood, the temple, parenting, callings in the Church, and serving others? Have you observed one another under stress, responding to success and failure, resisting anger, and dealing with setbacks? Does the person you are dating tear others down or build them up? Is his or her attitude and language and conduct what you would like to live with every day?"
A few years ago, I was given a book by my parents called "Martina the Beautiful Cockroach" by Carmen Agra Deedy. It is a cute story from a Cuban folktale about a Cockroach who is meeting suitors. Her grandma told her to have all of her suitors take a test; the hot coffee test. When Martina spills give the coffee test by spilling hot coffee on the shoes of her suitor, she gets a glimpse at who they are really like. There is a lot to learn from this coffee test. When you date, don't just see the person you are dating in sunny circumstances. See how they act on their rainy and stormy days as well. It may save you from heartache later.