I missed it, but you did explicitly tell the stalker not to contact you anymore, right? I remember something about "How would your wife feel, this is inappropriate, etc." but I don't remember whether you ever simply said "Do not contact me again. Your persistence is beginning to seem threatening. I will not reply."
If you haven't, it really is a good idea. It's not that he shouldn't have taken the hint, it's just that he clearly hasn't, and if (God forbid) you ever reach a point where you have to refer the matter to the police, for instance, the first thing everyone will look for is the fact that you broke contact (which you've done perfectly) and told him to stop contacting you (which is the part I can't remember.)
I'm not an expert but I've dealt with unwanted attention from everyone from neo-Nazis to a retire state police trooper. (The technical term is "[censored] magnet.")
