Why does God care? He cares because he loves us and yearns to see his creation blessed and fruitful. He told Adam and Eve to replenish the Earth and gave them the means to do so. The damage that sin brought in through disobedience has caused great division among those who have dared to obey God in being married. The tools God gives us are quite available to those who desire to be successful in their relationship of husband and wife. The beginning of this is found in the best toolbox ever put together, the word of God. 

If you and your spouse would open it with a true heart for knowledge and instruction, the author would surely and most assuredly guide you to the things required for your situation and prepare you to be an example to others. He gives common sense but requires humility to grow in understanding and implementation of his wisdom. 

I have tried over the years to help couples from every walk of life realize the importance of acknowledging that you cannot meet the demands of governing a marriage in joy and effectively raising a family without the great author and finisher of our faith. I've known couples who ignored this advice and rejected the tools made available by God, and their marriages did not last, or they were most miserable and all manner of discord was brought into their institution. The result was bitterness, infidelity, and no peace, and eventually, it was destroyed. I've also known couples that have navigated the waters of life in their institution for well over 60 years and took the time to find the wisdom of God in using the tools he provided in raising their families and obtaining peace. 

You, too, can change the course of your marriage and recover the joys you shared when you realized your love for each other. You must set aside the destructiveness of pride and arrogance and pursue the knowledge, understanding, and the wisdom of God in Christ Jesus.