In my opinion, the narrator had a friend/ lover, who betrayed him or just drastically changed in a bad way. That is why, the singer can't get back the feeling he had for that person and wanted him to leave or to die. He says that this was his choice, so he was the one to make other person disappear from his life - probably killed him or said something that would make him never come back. Obviously there are no regrets in the end, expect for the fact that he cried/ felt bad about his action back in the day, because he knows that person is so callous he would have never cried for him.
In my opinion, the narrator had a friend/ lover, who betrayed him or just drastically changed in a bad way. That is why, the singer can't get back the feeling he had for that person and wanted him to leave or to die. He says that this was his choice, so he was the one to make other person disappear from his life - probably killed him or said something that would make him never come back. Obviously there are no regrets in the end, expect for the fact that he cried/ felt bad about his action back in the day, because he knows that person is so callous he would have never cried for him.