I think this song tells about a relationship in which one of them are really in love, and thinks "you're still the one" even after all is said and done, he/she thinks they are perfect measured pieces that fit together. But the other person don't think the same, they push and pull closer, and even though the one who's speak is the the strength behind, he/she still isn't the one, which is unexpected like a sucker punch.
I think this song tells about a relationship in which one of them are really in love, and thinks "you're still the one" even after all is said and done, he/she thinks they are perfect measured pieces that fit together. But the other person don't think the same, they push and pull closer, and even though the one who's speak is the the strength behind, he/she still isn't the one, which is unexpected like a sucker punch.