Well, chances are you're just coping with the loss still. After losing a loved one/relative/friend/whatever, it's usually very deeply impressed upon your mind for a while, and things that are deeply impressed upon your mind tend to show up frequently in dreams. To further this, feelings in dreams are fickle things. Often feelings are extremely polar in dreams--People are unconditionally loved, unconditionally hated or you are entirely indifferent to them.