不痛不痒别以为我丧心病狂
[bù tòng bù yăng bié yĭ wéi wŏ sāng xīn bìng kuáng]
A sarcastic comment saying that just because the speaker doesn’t react outwardly ('neither hurts nor feels good'), it doesn’t mean they are heartless. Expresses internal feelings despite appearing indifferent on the outside.