Cuz she's an ******* too...
"I'll call you later" is a polite way of saying "goodbye." I thought you knew that.
Never been in that situation but honestly there are two real reasons.
1. I was too nervous and also didn't want to appear as needy or clingy as women hate that.
2. I lost the number
Was busy in some stuff I liked / Wasn't in the mood to be chatty / Suspected it wouldn't work out / Was chasing lotsa tails
phone sanitation engineer never showed
i swear i forgot