He sounds a little controlling an obsessive in my opinion, but it's understandable that you still care about him so much even though you've lost the romantic love. If you've had to try and fight so hard to keep the relationship alive, it really isn't the right one for you. There's somebody out there that's perfect for you, you just have to look hard enough. It may find you in one month, or maybe 10 years but hope hasn't left. Hope has never left.

It really sounds to me like he is becoming very stalkerish... You should be very careful about him. Even though you care about him, he could still hurt you. Even though you've told him to back off so many times, really try and make yourself seem firm and clear. If necessary, you may have to threaten to get authorities involved. It's time for HIM to move on and stop whining over it. If he feels so much angst about you two splitting, he should keep it at least to himself or away from you. If he really wanted it to work again, he'd try and be more considerate of the feelings his attitude is causing YOU.

Good luck, and try and keep your chin up. You're in my thoughts.