I've actually found that comment to mean that I'm "In" when women say that.
Means their actually interested in you and that you've given them JUST enough to tantalize their expectations
That's when you do either two things...
1). If your just trying to Smash, you tell THEM what you KNOW they want to hear, play into their fantasy and use it to loosen them panties
2). If you are actually into her you tell her a little more about yourself, see how she reacts, and based upon her reactions keep going, feel out if her personality matches yours and if a relationship would be palatable