Donkey:
First let me tell you: also you are sending signals, even if you think you do not. Maybe they are the wrong ones, but be sure, you DO. So, if you have fear, it probably means already a negative signal. My tip: cool down, relax, enjoy, and do not feel ashamed for being yourself.

It is a question of mutual sympathy and communication. I like getting the eye contact first, slightly longer than usual. If I get a reaction (interest on the other side), I´d continue with a smile. If it comes back I might start a little talk. From something normal changing to something personal. If there is a give-and-take everything is ok. If it is all singlesided, I automatically stop it, because I would not feel ok with that communication. If it is balanced, I am on the train........

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If every material thing is gone, my smile and my tears stay left.