Is it a good thing if your crush knows you like him?
Yes it is. Even if he doesn't like you in the first place. As the time passes he will eventually might fall in love with you.
It can b, bc it can let them no that its ok if they like u back bc sometimes the crush won't do anything until they no the other person likes them first
Only if you play your cards the right way, to where they had to want to see it through your genuineness and refrain from inconveniencing him.
Yes and no.