Quote without comment Romantic fantasy kills. It will cause you to say foolish and inappropriate things to strangers. It will make you pay intense attention to the most casual of flirtations. It will lead you to invest your emotions in the shakiest of futures.
Consciousness destroys the act.
You meet a girl. Because you'll have a hell of a time being natural and spontaneous with this girl, with expectations clogging your brain. Everything will take on enormous proportions. You'll be living spun-sugar dreams of bliss, which will cause you to make insanely portentous remarks every time you speak and to stumble over your feet every time you try to take her into your arms. The girl will get away.