If you see people or things disappearing before your very eyes, this is a dream that is pointing up your insecurities and concern about the important people, conditions, situations, or people that might disappear from your life. This an anxiety dream and shows that you need to work on you self image through building your self worth.
Something or someone who disappears can represent:
A sudden lack of availability, accessibility, or understanding of whatever is represented by the thing that disappeared
A decrease in importance, or perceived importance, of whatever is represented by the thing that disappeared
A wish to disappear or not be seen, or to get out of responsibilities or avoid blame, embarrassment, or some other undesired experience