Girls, how do you feel about guys not admitting their feelings to you?

To clarify what I mean is, a guy who likes you, could be a guy from class or a work colleague, he likes you but he never tells you. You remember him as a sweet guy and thats it. Eventually let's say you leave or he leaves the company or school ends essentially going in different paths in life. Obviously this is with the condition of you are not married. I'm sure a committed young woman isn't going to "explore" other options or think of other guys.

Girls, how do you feel about guys not admitting their feelings to you?
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