Gothic_Outkast's "love" is a short, honest attempt to define a feeling the speaker admits they've never really mastered. Love is called "complex yet simple" and "Painful and happy," and the line stumbles over itself, repeating "love is filled" before landing on "oxymoron." That stumble feels like someone thinking out loud and not quite finding the words.
The speaker's idea of love is mostly about nervous attraction: hanging on someone's every word, getting attached, feeling embarrassed by it, and staying quiet so as not to look foolish. It's less a grand romance than a shy, self-conscious ache.
The ending turns playful. The speaker jokes that as a Taurus they might be wrong, since Taurus people supposedly can't fall in love and would answer "I love you" with a doubtful "really." The humor works as a shield, but it also hints at real uncertainty. The mood is awkward, vulnerable, and quietly funny.