Dear JollyJoe:
I would send him a message (keeping a copy of it for your record) telling him that you are very sorry that he is hurt and has been so hurt because you did not and will not have a romantic relationship with him. Tell him you don’t believe a friendship is possible between two people when one of them is very interested in the other as a romantic partner. Tell him that you are regretfully choosing a no-contact policy with him, that you will not contact him no matter what, and that you are demanding that he will not contact you, no matter what.
I think that a no-contact is required here because he’s been focused on you for so long, that he needs to give up on any and all possibility of a relationship with you. He needs a no-contact with you, so to give himself the opportunity to move on. Because he wasn’t able or willing to initiate a no-contact with you, better you initiate it yourself.
anita