Well, Shawn has revealed that it's actually about a fictional character!
"I was reading a movie script that I was possibly going to be in and the girl who 'my character' kind of falls in love with, I actually really loved, like I really liked the character," he admitted.
Um, we need to find out who this person is STAT.
He added, "I wrote the song about her [the character]. So it's not a real girl, that one isn't a real girl."
Ellie Bamber who stars in the music video basically plays out the movie character though. So, we guess that's his dream gal right there!