I think this song in general is pretty much describing the typical sibling relationship, when they're younger, of course siblings will fight most of time, so the first part of the song kind of describes the love-hate relationship between two siblings, whereas the rest describes the siblings when they're older, where they love eachother and don't fight as much as they used to and such and the special memories that they have with eachother have a special place in their hearts and so on.
I think this song in general is pretty much describing the typical sibling relationship, when they're younger, of course siblings will fight most of time, so the first part of the song kind of describes the love-hate relationship between two siblings, whereas the rest describes the siblings when they're older, where they love eachother and don't fight as much as they used to and such and the special memories that they have with eachother have a special place in their hearts and so on.