Your crush knows you like him since your friend told him and your crush's friend asks you if you like your crush and he says your crush asked him to ask you does your crush like you?
Okay, I think I followed this; yes, if your crush's friend is
asking you if you like your crush. YOUR CRUSH IS DESPERATE!
otherwise he/she would probably try to keep cool and find out
themself.
I think this means your crush likes you.