For once, I'm going to ignore the œ here - and it's for this reason I've held off on posting this. How much Cœur de Pirate do you actually need? She adds a little to the song, but it's Georgio's song.
The song is about the uncertainty of love in the modern era - a fuzzy concept in the narrator's eyes. He's been waiting for a sign from the girl he loves - someone he should probably just let go of. He eventually gets there, but the song is painful and sad while he does.