What do you think about a HB 8 who has a boyfriend, still thinks about her ex-boyfriend (and make out with him sometimes) and have a crush on another guy (that's me)? Does the words "attention *****" came to your mind too? 
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.