@ Picard - Pretty much yeah. With this assuming you know what the girl is thinking, you can end up creating your very own limiting beliefs, even if they are just in that moment. You can end up thinking too much and talk yourself out of a potentially positive situation. Even thought the girl is more than likely thinking great things about you!

Like Kowalski said on a thread recently, it is best to 'feel you way around'... as opposed to trying to predict and look out for indicators.