The main reason why the story does not have a happy ending is because of tragedy.
If there isn't a way out of their dilemma, what are they supposed to do?
Will they passively accept it?
A love story that would last... forever? Are they able to wait until forever? Are they able to believe in fate and destiny?
Could a three week attraction grown into love and affection?
Are they able to say the three words they are dying to confess or will they end up... with an unrequitted love?
#JustThreeWords