[@AcerRo] well I apparently know nothing about love then except for the fact that 1.) They have mutual affections AND GET ALONG, 2.) Their SEXUALITY defines what kind of relationship they have 3.) they aren't just 18 and 19 year old KIDS AND 4.) in their case, DON'T HAVE A KID THAT COULD POTENTIALLY DESTROY THE WORLD ON ACCIDENT. 

Edit: oh and I'm pretty sure that the ship Rose and Leo were on, sank. Something along the lines of "I'll never let go!"

but who am I to question romance when I clearly know nothing! You clearly have more knowledge on how romance works! :)