The date went well. Then it went real well. Then he came and he suddenly got all weird.
He got really quiet and distant. I don't know if it was just a sudden onset of sleepiness, or if it was some fucked psychological thing like regret or "she put out too soon, dirty slut, forget her" or "well, now I don't have to pretend to like her."
Also, I have the magical power to be neurotic and obsessive about anything. Let's say it was sleepiness and I should go to sleep my owndamnself.