How can i impress a skater boy?

i don't know what his type is,but his sister is a skater,there is 1 other girl that is really ugly and she is obsessed with him,she even painted her nails with his name.I act totally cool around him and it looks like i don't really care,i am scared if he found out everybody would tease me.Our clmates are crazy they arrange fake weddings and it's humiliating,i really don't know what to do.We don't go to the same cl but we are fifth grade and he is in another cl,can you plz help meee?!!!!!!