Hi! Thanks for playing the game!
There is kinda already one option where you can do so. Though it is not explicitly a F-Off.
Where in the story made you want to tell off the girlfriend?
I understand where you are coming from.
However, I wanted to write some endings where the MC has less agency with how it ends, due to the choices they have made beforehand. I mean, this one is kind of a "bad ending". Not every ending has to be satisfying.
I am currently working on an update which will add 2 more endings. It should be out by the end of the month.
Thank you again for playing!