Person 1:
I love you
Person 2: I love you so much
Person 1: I love you most
Person 2:
I love you mostestestestestestest
Person 1: Hmmmmmm,
I love you 1 Billion
Person 2: I love you 1 trillion
Person 1: I love you 1 Quadrillion
Person 2: I love you 1 Qunitillon
Person 1: I love you 1 sextillion
Person 2: What comes after sextillion? You win.