What does it mean when a girl runs her fingers through your hair when I am sitting down on the couch and she's behind me standing up I am a guy and this was for a good 30 seconds?

Answer 1

This level of intimacy indicates she has personal affection towards you. The fact that you couldn't figure this out and you flocked to Answers.com to ask about it indicates you aren't intelligent, and have severe social deficiencies.