What is the most unnecessarily excessive thing you have ever done to accomplish something?

Edit - I corrected a few errors here and there: If you are willing to read until the end, you deserve proper structure and grammar

Director's Cut:
I was dating this girl back in university. It was the sort of relationship that, looking backwards now, we were more friends than partners. But I liked her, she liked me and we both wanted the best for one another. And at the time we were invested in making the relationship last, more by stubbornness than by commitment.
Back then she had this friend that was really close to her, they had a nice chemistry going on and those sort of things. I did not worry about it since he was also in a relationship and jealousy has never been my thing.
But I liked to joke about it, saying to my girlfriend things like "if we ever leave each other, I know you'll end up with him" or "you two will marry for sure one day".
And she always got mad when I did that.
But a weird kind of mad. A "whoa dude, take it down a few pegs" kind of mad. A "what are you not telling yourself?" kind of mad.
And she always stressed how I could be not wrong, how my whole judgment system was wrong and my whole brain was WRONG.
This was taken to an extent where she started to get mad at me every time she got out with him.
One night we were in a fight and she brought this thing up just to say again how I was wrong. That time I just calmly said "at this point I know I'm not".
She left without saying a word more, shoes still untied and crying in frustration.
She called me the next day saying that she was sorry, she apologized for how she overreacted and such, just like she apologized a million times before that.
I was numb at this point, I had rough months with my studies, quite a few familiar issues and I didn't want to be in a relationship anymore. So I just told her "I feel like taking a break" and hung up.
Seconds later I messaged him "Dude, this is your chance". He didn't answer.
He broke up with his girl the week later and the month after that they were together publicly. Rumors say that he even broke his engagement to do so, but I'm not 100% sure it's true.
She never really talked to me again because she is a really prideful person and I get really snarky when I'm right.

Fast forward a whole year, one day I'm back home from work, I switch on my laptop and start scrolling through social media: I see a picture of them.
He's in a really elegant tuxedo, she's in a white dress, people throwing grains of rice at them. Everyone's happy.
I open the fridge and crack a beer, thinking "feels good to be right". I try to smile but I can't.