Anyone who has ever been a caregiver knows how grueling the job can be and how frequently things threaten to go off the rails. I don’t blame you for the mix-up over the return flight. (It could happen to anyone.) But I urge you to rethink your position on your dad’s friend. Call him on the phone now. Tell him what an incredible friend he has been to your father and how helpful he has been to you. Don’t wait for his funeral to pay your respects.