God gives us an opportunity to gain a glimpse of the Love which He has for us by allowing us to raise His precious children. God knows that this preparation of creating and raising a family is central for us to "prepare to meet God" (see Alma 34:32). In fact, Heaven is in reality a continuation of the ideal home.
Because God knows that we find joy in our family relationships, He intends for them to not last 'til death do us part', but for time and all eternity! It is through the sealing keys which Christ gave to Peter (see Matthew 16:19) , who in turn restored them to the prophet Joseph Smith (see Doctrine & Covenants 27:12-13) that our families are able to be sealed to each other after we depart this time of mortality.
In fact, for our homes to be eternal, it is to be done in the Lord's house; holy temples dedicated to the Lord.