this is why I have so many different rods and reels of different value. If I take someone fishing that is experienced, than I let them use better equipment than someone that, has never fished that much. I have had several rods and reels broken by someone that I took fishing. I had one person stand on top of my Plano Phantom Pro tackle box, and crushed the lid. I asked him not to stand on my tackle box and he said it was already broken before he stood on it. I never took him fishing again. But as far as rods or reels I value the friendships more that the fishing equipment. I can replace the fishing equipment ,but friendships, true friendships, are hard to come by.
If your friend paid you for the rod, then put a new tip on the rod and give it to the friend ,and ask that there not be any bad feeling. Rod tips are very fragile. I have broken some and not noticed it right away.