What does the Bible say about Marriage?
Marriage was God’s idea.
Genesis 2:18 (NIV): “The LORD God said, “It is not good for the man to be alone. I will make a helper suitable for him.””
Marriage is an indissoluble relationship, except on the highest grounds. 
Matthew 19:9 (NIV): “I tell you that anyone who divorces his wife, except for sexual immorality, and marries another woman commits adultery.”
God wants people to consider their marriage permanent. 
Mark 10: 6-9 (NIV): “But at the beginning of creation God made them male and female. For this reason a man will leave his father and mother be united to his wife, and the two will become one flesh. So they are no longer two, but one. Therefore what God has joined together, let man not separate.”
Husbands and wives are to love and respect each other. 
Ephesians 5:21-28 (NRSV): “Be subject to one another out of reverence for Christ. Wives, be subject to your husbands as you are to the Lord. For the husband is the head of the church, the body of which he is the Savior. Just as the church is subject to Christ, so also wives ought to be, in everything, to their husbands. Husbands, love your wives, just as Christ loved the church and gave himself up for her, in order to make her holy by cleansing her with the washing of water by the world, so as to present the church to himself in splendor, without a spot or wrinkle or anything of the kind-yes, so that she may be holy and without blemish. In the same way, husbands should love their wives as they do their own bodies. He who loves his wife loves himself.”  
God hates divorce.
Malachi 2:16: “”I hate divorce,” says the LORD God of Israel,…”