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: my buddy, his girlfriend and i have all been really good friends for a couple years now, but a month ago she broke up with him pretty much because she wanted to go and sleep around. but when they split she turned to me for support.

 one thing led to another and only a week or so after they broke up, me and her were sleeping together. i fucked up by getting feelings for my buddies ex when i fully knew going into it that she wanted to sleep with other guys.

Tifu by sleeping with my bestfriends ex-girlfriend