comment plz

How do you know if a boy secretly has a crush on you even when he does stuff to purposely make you mad at him and laugh about and some of his friends tell me that he doesn't like me also when he says that I'm not funny when his friends laugh hysterically bc of a note that I gave him bc yesterday I gave him a note during lunch and it said "you and your girlfriends(his friends that are boys thought that saying this would be funny) look good reading that note." and he read it then started laughing then he handed it to his friends and his friends started laughing hysterically. sry I kinda got a little off topic there but anyways how do you know if a boy likes you?