Do guys get subtle hints that someone isn't interested?

I usually don't like to tell them directly , especially it'll be weird to say ' hey I m not interested ' after someone texts me ' good morning '. So what I do is to give subtle hints; one word response , wait for several hours, say I m busy for going out etc. It could be a Dick move , but I wonder how well it works?
Do guys get subtle hints that someone isn't interested?
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