Lyric discussion by Lawcere 

Cover art for Trade Mistakes lyrics by Panic! at the Disco

It sort of sounds like the speaker is dead and the song is taking place at his funeral. He doesn't want to leave her alone in the living, he can't move on, and is struggeling with the notion of "saving her" - whether she should die to be with him or live without him.

Obviously, not all of the lyrics fit this idea, but that's my first impression.