Why won't he leave me alone?

I was talking to this guy almost two years ago but things didn't work out. When i told him i still cared about him recently he acted surprised that i still did...but refrained from admitting that he shared the same feelings. So i assumed he didn't love me any more.

I was accepting of this, and decided that it would be better if i didn't talk to him anymore so i could move on. Plus, it's kind of long distance and it is difficult and time consuming to try and stay in contact for a friendship that isn't even that strong.

But he started calling me immature for not wanting to talk to him. I tried to explain to him that i wasn't ignoring him out of spite, i just needed to distance my self for my own benefit but he still believed what i was doing was stupid. We've been arguing for months over this and i realized im just going to have to ignore his messages and hopefully if i stop responding he will get the picture.

But i still would like to know why he finds it so hard to let go of me. Why does he want to be my friend so badly? He has more than enough friends. And if he feels the same way as i do, and he knows how i feel...why doesn't he tell me? When i tried to stick around and talk to him, he didn't make an effort to talk to me. I would be online for a month and i would only speak to him 1-3 times cuz he's rarely on. Whats the point in asking someone to be online if your hardly on to talk to them? He reeeeaaally confuses me..and some clarity would be greatly appreciated. Thanks.