This article is from the Romance and Dating FAQ, by Henning Klaskala alt.romance.FAQ@online.de with numerous contributions by others.
Acquiring an understanding of non-verbal communication was recommended.
People say so much, their gestures, looks, and body
language in general. Even the way they build sentences
is different when they are happy or sad. Sometimes it
is obvious, sometimes you have to know them for a while.
That's one part of it. The other is using this
information.
Touch was suggested as a way of "testing the waters."
There's a good way to know if someone is ready for your
friendship. Find an excuse and touch their hand. You
can lie and you can keep your face calm, but few people
can stand a touch from someone they don't like.
Looking at the way people are acting gives an indication of
their feelings, too.
I've also found that watching people helps. If I have
known someone for a long period of time and watch how
they behave, then eventually if they start doing things
that are "out of character", I'm better at picking that up.
 
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