From the chapter, "The Art of Conversation," from Mary Elizabeth's book Painless Speaking:
"Getting to know someone you think you might feel romantic about (or already do) is not the same as flirting. Flirting is acting romantic without being serious about the other person--in other words, tricking another person into thinking you're more interested, or interested in a deeper way, than you really are. Flirting is sometimes thought to be cool, but the fact is, it's lying, and it can really hurt people. Remember truth and trust, and don't flirt."