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: so i've just moved high schools, i liked my best friends' sister, i have only been at the new school for almost a month and my 'best friend' checked his sister's phone last night and saw some messages, he then went on to message me about why i said it and when i replied, i didn't get a chance to explain myself. when i went to school, i wanted to talk to him about it instantly but he did not let me, he shut me down immediately.
i know i've messed up because i've been hitting on her behind his back but what can i do to either get our friendship back or talk to him one to one again?

edit 1: he just acts as a father figure to her because they have lost their father. im not angry at him for being angry at me, i just really want to atleast talk to him about it, even if it means we wont be friends after this.

TIFU by talking to my 'best friends' sister