What does 2 Samuel 12:22 mean?

David said, 'While the boy was alive, I thought, Maybe the Lord will be kind and let him live. But now that he's gone, why keep fasting? I can't bring him back. I'll go to him someday, but he won't come back to me.' 2 Samuel 12:22 - Modern Text Bible

(David explains his hope and acceptance. He did all he could while there was a chance, but now he faces reality and looks ahead.)