Is seeing this man really worth the anxiety? Would it just be better to not engage with him? It's your prerogative to see who you wish, so you don't even need to say a reason other than you have no availability for whatever time he suggests.
Personally, confidentiality and discretion is paramount. My time with a man is private and I am very clear about this, ergo I do not see anyone who reviews. However for a myriad of reasons, it is unlikely the hobbyists and review fans will deign to look at my profile anyway, and thank goodness for that!