Lyric discussion by astereo 

Cover art for Miss Delaney lyrics by Jack's Mannequin

this song is amazing

I'm pretty sure the meaning has to do with his ex, as do most of the songs on everything in transit. During his time with SoCo, his girlfriend treated him like shit, so he wrote up this song

"Where's your boyfriend? He isn't up in heaven, so why treat him like he's dead?"

I'm not 100% sure, but it's pretty likely