P,
You might try asking your instructor to let you fly a number of circuits and not to say anything to you, or to touch the controls, unless he deems it necessary in order to ensure safety. Most importantly, ask him to let you try to fix your own mistakes without out his help/input, unless it's going too far.
It may well show you that you do still need someone there, or it may show him that you've learned more than he had tought.
dp