It seems that the song's about one's significant other who while was just enough for the protagonist, they never did really catch up w/ their flaws, lied about loving them, cheated, and left them for the person they cheated with. The protagonist gave their s/o a primary reason to live w/ their deep words. They end up planning to get revenge on their ex in a way to "make their ex wish they were back w/ then," even though they predict their ex will kill them once they encounter.
It seems that the song's about one's significant other who while was just enough for the protagonist, they never did really catch up w/ their flaws, lied about loving them, cheated, and left them for the person they cheated with. The protagonist gave their s/o a primary reason to live w/ their deep words. They end up planning to get revenge on their ex in a way to "make their ex wish they were back w/ then," even though they predict their ex will kill them once they encounter.