he thinks shes cheating on him and that if she isnt back by sunset his theory will be confirmed as true
or
they have an on-and-off relationship and that he wants her to come back to him even though its not good for either of them. "if lilly isnt back by sunset i swear to god i hope she tells the truth and its not okay if you go or stay"
or hey, it could be both!!! but these are just guesses tho.
i think this song can mean that either
he thinks shes cheating on him and that if she isnt back by sunset his theory will be confirmed as true
or
they have an on-and-off relationship and that he wants her to come back to him even though its not good for either of them. "if lilly isnt back by sunset i swear to god i hope she tells the truth and its not okay if you go or stay"
or hey, it could be both!!! but these are just guesses tho.