If I went back in time and met myself when I was confused in dealing with girls and trying to understand them, one of the very first things I would say to myself is: learn how to know when a girl is not interested in you... because that way, you won't waste your time, and you'll know when to walk away and stop exhausting yourself for nothing. So the question is: how? How will you know that a girl is not interested in you? Let me tell you—it’s actually very easy to know. So listen to me carefully, because in these next ten minutes you’re giving me, I’ll teach you a skill that will stay with you for the rest of your life…