dude, i know exactly how you feel. youv made one "mistake" and you feel like it is all over. she gives you 1 positive response and you feel like your in heaven, the next she gives a slightly negative vibe and its all hell. Trust me, relax. Im a few years older than you and let me tell you. This PUA stuff works best with more mature girls. The girls at your age only requier you to Look groomed, Keep the conversations fun, a little push pull and just a little bit of negging but you should just sprinkle it all over the conversation.