我不蛇蝎怎能毁你所爱
[wŏ bù shé xiē zĕn néng huĭ nĭ suŏ ài]
Adapts from the saying implying that if I'm not as ruthless as poison, how could I possibly have destroyed what you loved? It shows a person reflecting on their role in a destructive event with a somewhat self-mocking tone.