You may want to consider talking to him on some level. There is the chance that if you do not talk with him about it, that he may come to think that you kept things from him. He is going to find out this fall once school starts. If you do decide to tell him anything, I would not make a big deal out of it. And as far as the professional goes, I am not the only one who has gotten bad advice or been mis diagnosed. Follow your heart, only you know what is right.