We are all guilty of this, let's be honest we all create so many scenarios in our head of our own creation, and nothing hurts us more than doing this.
I've stopped doing this only when I read a quote that was shocking for me, Seneca (The famous philosopher said:
"We suffer more in our imagination than in reality"
I couldn't agree more with this quote, and you could find that maybe when you have a fight with one of your friends, you imagine many many scenarios after the real fight has even finished, so the fight is found nowhere except in your mind, and it feels just as if you're still in a fight.
Also, another thing is that we are guilty of is; planning for the far future, like saying when I'm 50 years old I want to do this and that.
You could waste much time doing this, but we don't have anything except the present to achieve our dreams, the past has already gone, and we know nothing about the future.
So let us try our best to stop imagining scenes that either hurt us or waste our time, let's focus on our present so that we could build the best future ever.
I wish you all the best in life and thanks for your time.