I can't "read" body language or interpret/identify nonverbal signals at all (Why is that guy smiling at me? Is that a smile or a grimace, anyway? Is he just being polite? Is he silently laughing at some private joke? Did I just step in something? Does this have anything to do with *me*, at all? Etc., etc., ad nauseam...), so unless a guy were really self-confident, and thus had the balls to walk up to me and begin a conversation (as, granted, a handful of males have done, over the years, whilst drunk), I'd have *absolutely no clue* that the guy in question had any interest in me. Have I missed out on potential happiness along the way because of missed or misinterpreted signals? Maybe, and that hurts. A lot. 
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Remembering that you are going to die is the best way I know to avoid the trap of thinking you have something to lose. You are already naked. There is no reason not to follow your heart.
~Steve Jobs