"so say it to them, or say it to yourself in the mirror. say it in a letter you'll never send, or in a book millions might read someday..."
i decided to do a bit of both.
"What would you do if you knew this is your last day on earth?"
"I would spent it with you!"
"And what if you didn't know it?"
You only need to know that you and your friends are 20 years old. It might as well has strong language here and there.
And also... it's a sad story