Because marriage on earth models what it is like to be loved by God in heaven it is not a necessary institution in heaven.  Jesus says in Matthew 22:30: “At the resurrection they neither marry nor are given in marriage; they will be like the angels in heaven.”

This does not mean that a husband and wife will no longer know each other in heaven or that they could not still have a close relationship. What it does seem to indicate, though, is that a husband and wife will no longer be married in heaven. They will be fully living in God’s glory and love and there will no longer be a need for the earthly institution of marriage.