You are in a unique situation as you know that people have read it. I (and most people on HubPages) don't know the people who are reading my hubs. There is always a difference between HubPages stats and Google Analytics for example so there is always some variation.
How long ago did your friend view your hub? Over the weekend there is a significant lag with stats updating and HubPages never seems to update them on a regular schedule. Perhaps look at Google Analytics Real time and ask your friend to look at the hub in question and see if it registers.