Boyfriend jokingly bit my nose 9 months post-op - could this have damaged/reshaped cartilage?

Good Morning! Great question. If the pain was minimal and there was no significant, external change, I would think it's unlikely to be a significant problem. I would continue to monitor for signs of mobility / instability of your nose. If things remain unchanged, you should be good. Seek follow-up with your surgeon to ensure optimal healing. Hope that helps!