No situation is alike, hence you should judge all interactions individually (that is not to say some rules of thumb are worthless). Generally, a girl's no response suggests no interest if it clearly is a No girl. However, you may sometimes be texting with weak Maybes and their situation days, weeks, or months later may change and she'll become susceptible to your courtship endeavours, hence shooting her a text some time later may generate a positive response.
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My Adventures in Game updates on the go: twits by Max Detrick
Unbowed. Unbent. Unbroken.
I don’t ever give up. I mean, I’d have to be dead or completely incapacitated.
-- Elon Musk