I've had this happen a few times. I leave a girl a message, she calls me back and I'm not around my phone. On the message they will go into detail about where they were, the reason they weren't home. Why is this?
Dinner ran three hours. She laughed at everything. You walked her to her car thinking this one's locked in.
Then: nothing. Two texts. No reply. What happened?
You did what most men do on a great date. You filled every silence, answered every question, and left her with nothing to wonder about. No mystery. Nothing to sit with when she got home.
Rule 3 of the "22 Rules" changes the ending: tell her a little, hold back the rest, and let her imagination do the chasing. The ghosting stops too.