It clearly seems to be a song about being psychologically manipulative. And more specifically, about mathematically calculating your every move ("the long silence," "the bored kiss," "the awkward look") in a romantic relationship so as not to seem too attached to the other person, and you showing your so-called love just enough for it to be acceptable (aka: so your "passion is accurate")... in order to not get hurt when the relationship ends. Basically a result of being afraid of emotional commitment. Consequently, the other person "carries the weight of it"/carries the burden of enduring your behaviour.
It clearly seems to be a song about being psychologically manipulative. And more specifically, about mathematically calculating your every move ("the long silence," "the bored kiss," "the awkward look") in a romantic relationship so as not to seem too attached to the other person, and you showing your so-called love just enough for it to be acceptable (aka: so your "passion is accurate")... in order to not get hurt when the relationship ends. Basically a result of being afraid of emotional commitment. Consequently, the other person "carries the weight of it"/carries the burden of enduring your behaviour.