Those are the sweetest words you can hear when you leave a house. Particularly when they come from kids, because you know then that they are genuine.
I visited a mom and her two kids Shabbos afternoon. The four-year-old girl and the eight-year-old boy wrestled with me on the couch. Then the girl wanted me to put her on my shoulders and walk her around the neighborhood with her mom and brother and two dogs. I got all tangled up.
I left after an hour. As I was walking away, the little girl ran out and asked, "When are you coming back?"
Most every time I leave the home, one of the two kids runs out and asks that.
I remember my father drilled into me an opposite message from the book of Proverbs: "Remove your step from your neighbor's door lest he grow to hate you."
Thus, I try to be sparing in visiting people, or even sending unsolicited email. Most of my social occasions are suggested by my friends rather than by me because I desperately don't want to come across as emotionally needy as I truly am.