How do guys act when they like someone? What do guys act like when they have feelings for someone I've heard some people say they don't pursue?

How do guys act when they like someone?

What do guys act like when they have feelings for someone

I've heard some people say they don't pursue or talk to a crush, which really confuses me tbh. Do all guys is avoid their crush and hope for the best or is it just a few

If so how do I detect if a guy likes me so I know if I should shoot a shot?
How do guys act when they like someone? What do guys act like when they have feelings for someone I've heard some people say they don't pursue?
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