i think this songs about keeping your chin up and not being a sad sack all the time basically. musically its all pretty chirpy and upbeat and then the fact that he says 'im over it' and 'get over it' about a thousand times in the tune makes me think that its about just letting go of things which have gone wrong or could go wrong and learning to just go with the flow.
thats just my opinion though so...
i think this songs about keeping your chin up and not being a sad sack all the time basically. musically its all pretty chirpy and upbeat and then the fact that he says 'im over it' and 'get over it' about a thousand times in the tune makes me think that its about just letting go of things which have gone wrong or could go wrong and learning to just go with the flow. thats just my opinion though so...