Relationships

If a guy and girl used to be relaxed and non-caring with each other, but now are awkward and shy... this change of behavior means what?

is it common to feelings to develop out of nowhere? i didn't care how i looked or how i acted around this guy before but now im all shy, self conscious, and make sure i dress nice, we used to be so chill and just whatever with each other now its all weird and awkward... he's changed in behavior too, really polite, quiet, different around me.

If a guy and girl used to be relaxed and non-caring with each other, but now are awkward and shy... this change of behavior means what?
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