What do most men feel after being rejected by someone they like?

What do most men feel after being rejected by someone they like?
Most guys are told to suck up all their pain and never show it. So I'm guessing it is extremely hard for some men to move on if they truly liked the girl in the first place right? I think it's the same for both genders as you imagine your future with this 'crush' or lover but then sudden it all collapses.
What do most men feel after being rejected by someone they like?
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