I have been noticing people who support Finnceline lately. I have this to say:
IT'S NOT GOING TO HAPPEN!!!!!!!!!
They're just friends! You gotta embrace the facts. What will Finn do when he passes Marceline's bitten age? Ever consider that! If anything, Finn will end up with either PB, FP, Space Angel Princess (SAP), WP, Raggedy Princess (RP), Susan Strong, Fionna (IT COULD HAPPEN!), or any other random princess or human girl his age.
Please, start a war in the comments if you like! Be dirty! Get what has been on your chests off NOW!