Shoෆ

Charlie Brown: Have you ever had that feeling when you can't stop smiling? 
          Your heart pounds inside your chest.
           You try to stand, but your knees become weak. 
          And then that Little Red-Haired Girl glance at you and all of life's possibilities become so clear?
          and then you realize
          she has no idea your alive...
          
          I wanna put that quote on one of my stories 
          but since i havent found that story fitted for this quote I'll just put it here

Can you guys help me please?
          
          Im trying to remember a story 
          
          I dont know if its a movie, story book, fanfic, etc
          
          But the plot is basically
          
          There was a girl and a boy
          
          They had feelings for each other
          
          They confess and became lovers
          
          One day boy/girl (because i dont know who dies) 
          
          dies from (i think and illness)
          
          Boy/girl gets a message from (opposite gender) boy/girl
          
          The text was everyday until it stopped cause it was only available for a year
          
          And thats how the story ends i dont know anything but that