I do feel for you.
You are caught in an endless loop of pain and regret - especially poignant is the part where you say you wanted him to love you, knowing that he didn't, and doesn't.
You have to get your mind onto something else, this is simply damaging you, with no prospect of a resolution in sight.
I have a friend who hurt so badly over loosing a woman that he neded up in a psychiatric ward - he simply fell apart completely. That was twenty-plus years ago, and he is married with children with but still pines after his lost love, but it's not the focus of his every living moment any more.
You will never forget this man, but you have to get him into a place in your mind where he doesn;t hurt you so badly.
You can train yourself to feel less about this, it can be done, but it is not easy.
You must make a start though, now, today.
He is not coming back, you are holding on to an emoitonal lifeline, and there is nothing on the end of it when you pull.
Look forward, be positive, and find things to occupy as much of your time as you can, and start to reconsrtruct your feelings without him taking over like this.
Good luck.