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: not today but yesterday, i fucked up by staying home instead of going out to dinner.

a little background. me and my s.o have been seeing each other for the past few months. a large point of contention between us was the fact that we always used her parents car and it would be nice if i had one so we wouldn't always be reliant on her parents goodwill. i say point of contention to denote the on going tirade that is hurled my way whenever we go anywhere and we have to use her car, that basically makes an appearance in the form of a quip or jab 85% of the time we speak.
fast forward to a week ago. i purchased a decent winter car and am spending the bulk of my spare cash on getting it up to spec and insured. because of this we have not gone out in a few weeks. yesterday she called me at work and asked me to take her out for dinner. well more like told me to take her out to dinner. you can probably guess where this is headed.
i refused, saying that is would be better for me to stay in to make sure i could handle the first insurance payment for the vehicle and that we could meet up later that evening for a drink or later that week...

fuck all kinds of duck if that was not the sign from the heavens she was waiting for that i was the basest of scoundrels and cheap bastards to grace the earth. how dare i, after the months of having her drive, have the brazen audacity to suggest staying in yet again. on a tuesday night. to add insult to injury, i later learn that she had argued her mom down for the use of their car and had gotten it to drive just as i was saying i should stay in. 

i know she was hurt that i said no to dinner, and there seemed to be know way to make her understand that i wanted to spend time with her, but i wanted to make sure everything was paid for just as much. unfortunately, aside from some short, angry text messages because she wouldn't pick up the phone last night, we haven't spoken since.

TIFU by living within my means