Definition: In this task, you are given a Reddit post as a text. Your task is to generate a title for this text. The title should start with "TIFU by", followed by a situation that caused humor. The title should contain 7-12 words, ideally.
Input: Text: background info: i was raised catholic, my mom, devoted af. my entire family is very religious and so is my gf, me, not at all. to each their own, right? anyways, i was watching a movie with my gf, of 6 years, and for some reason she looked over at me and whispered, "santa is not real." i looked back at her, leaned in, and whispered back at her, "god is not real." she laughed and thought it was funny i kept a straight face and said, "i'm being serious." everything went downhill from there she looked at me in disbelief and i looked back at her. the next minute was silent then she asked me, "are you atheist or something?" having the opportunity to confess this to her i agreed. she picked up, grabbed her purse, and stormed out screaming, "who the hell are you?!" i know it's not easy to understand so i let her walk out, now, she won't answer my calls or texts.

TIFU: By telling my girlfriend of 6 years I was atheist