Hi Kristi,
I finally thought of how to stop that guy.
Phase 1. Let him know that you really don't like the communications and that you are feeling he is harassing you. I know you've tried to discourage him and if you feel you've definitely done all you can with that, then go into what I call phase 2.
Phase 2. Since you have his phone number and you know what he does or where he works for a living, send him notice that you are not flattered by his attention and if he continues harassing you, then you will be forced to call his place of work and notify them of what he is doing on their time. You can be nice and tell him that you don't want to do that, but you will if you feel it is necessary.
Rebecca