John Calvin wrote, "the evil in our desire typically does not lie in what we want, but in that we want it too much." David realized his mistake. Marriage was a good thing. It was good for him to desire it. But God was mercifully using the difficult experience of having this desire denied to show him that he wanted it too much. He had been placing his hope for happiness in starting a courtship and getting married instead of in trusting God for his ultimate satisfaction.

Joshua Harris, Boy Meets Girl - page 61

Do not be anxious about anything, but in everything by prayer and petition, with thanksgiving, present your requests to God. And the peace of God, which transcends all understanding, will guard your hearts and your minds in Christ Jesus

Philippians 4:6-7