To dream that you are flirting represents your need for intimacy and affection. You may be about to enter into a serious relationship or commitment in the near future.
If you dream that someone you know is flirting with you, you sense that they are trying to get your attention in some way.
To dream of a stranger flirting with you, whether that attention is wanted or unwanted, means there is a repressed part of yourself that is dying to be heard and expressed.
On the whole, a prosperous omen, but not if you carry it to a heartless extent, or cause tears.