Do you have a crush on someone and they don't know it? And is it fun and flirty or hopless and sad?

I really enjoy crushes and I have a couple but, not really around me. To me crushes are fun , flirty , and exciting. So how do you view crushes... lol

Do you have a crush on someone and they don't know it? And is it fun and flirty or hopless and sad?
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