Guessing you're a HS senior since you mention application. A lot of variables here but, in my son's experience, this a pretty standard way of indicating genuine interest, as opposed to "hey, we'd like to see you at a camp;" but not necessarily that they absolutely have to have you commit verbally right now. If you're interested in the school, I certainly don't think it would hurt you to provide him with this information and further the conversation to find out where you sit on his board at your position. If not, you can find a way to politely and respectfully let him know that you've moved on. Best of luck!