Shy guys only!! when a girl compliments you, how do you react?

When a girl texts you and says you looked nice today or compliments you on something and you really like the girl how do you react? is it possible to not reply because you get scared at this? Or if you liked her would you always reply and if you didn't like her the no reply is because she's creeping you out? Shy guys only!
Shy guys only!! when a girl compliments you, how do you react?
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