How do you flirt with a boy you like?

ok well this may be weird but i don't know how to flirt lolz im in 7th grade im 12 so yea lolz. well my best friend says i flirt with him but i don't notice so please help and how do you know his flirting back?? PLEASE HELP!!How do you flirt with a boy you like?
funny im in the 7th grade and im 12 also so i think ill be the most help. ima tell u to flirt (the 12 yr old way) well always smile stare at him when he aint looking play wit him act like u dont like him by hitting him but laugh afterwards.always stay fresh clean and always look good like you going out to a party all the time. simile alot ,when u get near him kind of walk a little slower than wat u do now. when u with u friends be the life of the crowd. be the #1 thing is do it when he around so u can get him to notice u. :) hope i helped p.s practice before u actually do it because beginners tend to mess up try it in the mirror