The boy is leaving and we are struggling

So this past weekend I was reminded why John and I are having such a hard time thinking of our boy leaving. There was a mom there who was one minute talking about how great her kid was and then, bam, arguing with her daughter for hours, ridiculously. That's why we are having such a hard time. He was a joy to raise, a pleasure to be around, and fun. We don't fight often, he hates it.