I'm taking this as a literal breakup song, but as one that's not overly sad from the eyes of Kevin. It comes across more as a feeling of guilt rather than heartbreak, like they put the person through tons of shit and when it feels like "murder" to put their "heart through this" it's because they know they've already put them through enough, rather than it feeling like murder because it's heartbreaking. And the way he says "I know that I'll be happier" then follows it up with "...and I know you will, too!" it comes across to me as Kevin being less invested than the other person which is also substantiated by the evidence in this song he's mistreated them quite a bit/made them unhappy, and the adding of "eventually" after saying they'll be happy too seems as if to say; I'm going to be a lot happier single, and you will too but it may take longer than me. I'm sure Kevin cares a lot about this person, there's no questioning that, but I wouldn't say it's a sad breakup song, at least not for him. It's almost like a relief "I know just what I've got to do, and it's got to be soon"
I'm taking this as a literal breakup song, but as one that's not overly sad from the eyes of Kevin. It comes across more as a feeling of guilt rather than heartbreak, like they put the person through tons of shit and when it feels like "murder" to put their "heart through this" it's because they know they've already put them through enough, rather than it feeling like murder because it's heartbreaking. And the way he says "I know that I'll be happier" then follows it up with "...and I know you will, too!" it comes across to me as Kevin being less invested than the other person which is also substantiated by the evidence in this song he's mistreated them quite a bit/made them unhappy, and the adding of "eventually" after saying they'll be happy too seems as if to say; I'm going to be a lot happier single, and you will too but it may take longer than me. I'm sure Kevin cares a lot about this person, there's no questioning that, but I wouldn't say it's a sad breakup song, at least not for him. It's almost like a relief "I know just what I've got to do, and it's got to be soon"