How do u know if your crush likes you?

do u flirt with them? or try to make ur crush jealous? so yea how do u know if your crush likes you back?How do u know if your crush likes you?
If he likes you he will tell you.How do u know if your crush likes you?
If he likes you and has the guts or courage to tell you he will. If he doesn't then theres plenty more fish in the sea. However don't play games because someone will always end up getting hurt..Good Luck =)...x
do both see which one works and you'll find out.