Secondly, this was the exception in the Old Testament, certainly not the rule. Thirdly, about Deuteronomy 24, we need to see that this was not the final say on divorce. Note, there is one exception. It is the stuff of television, magazines, and cartoons. But obedience to God's command regarding marriage brings blessing and joy.
Every married person knows that it is.
Jesus never said that obedience to Him would be easy. Pray for the grace and wisdom of God to reconcile. God brought you together. But remember, God joined you together. And what God joined together, we may not put asunder.