God designed marriage; we see this in Genesis. In fact, God designed marriage prior to "the fall" where sin entered in. Marriage is good, we as sinful humans can hurt our spouses, but the act of marriage is a good gift from God.
Marriage is the walking Gospel
One of the beauties of marriage is it symbolizes the union of Christ and the church. Which ultimately shows the gospel, such an honor and responsibility.
Marriage Helps us Learn to Love
One of the Biblical reasons for marriage is to teach you how to love, learning that love is a verb to be acted out every day, no matter what life throws at you! Learning Love is patient, kind, not jealous, isn't arrogant, rejoices in the truth, hopes, and never-ends.
"The Lord God said, “It is not good for the man to be alone. I will make a helper suitable for him.”