They will eventually fade. An increasing awareness of the loss brings a welling-up of feelings that may be difficult to understand. You may feel helpless, angry, guilty, lonely or relieved. You need time to cry and talk. It takes great courage to risk feeling the depth of the loss.
Loss intensifies feelings of helplessness.
Being left by someone close to you is a form of abandonment. Even when death is the cause, anger at that person is a perfectly natural response. I was out to dinner with a friend. Looking around the restaurant I saw couples everywhere talking, laughing and enjoying each other. They were hideous to me.