Food or drug addicts, people in addictive relationships may dream their blood of being sucked from them. If you are the vampire in your dream you may be sucking in life energy or aspects of another that you need to complete yourself. It suggests you are being drained of your life energy or autonomy by another, or by repressed instincts. The Freudian view is that vampires or evil creatures represent repressed infantile feelings toward sex, especially incest in case of sucking.