How can i get revnge on thiz girl?

alright so i like thiz boy and he haz a gf. and he could like me bak . Now his snoby gf knows bout meh liking him and so shes a ''butt face'' to meh and nobody notices how do i get her back for all the things she does to meh like flipping meh off caling meh names and giving meh dirty looks talking bout meh badly to her friends to make meh seem like the bad one. PS SHE DOSENT EVN LIKE HER BF !!! SHE SAID SO TO HER BFFL SHE LIKES A GUY IN 8th GRADE UGH SH SAYS SHE HAZ NO FEELINGS FOR HER BF AND SHES BROKEN UP WITH HIM A WHOLE BUNCH OF TIMES AND HURTS HIM BY DOING SO AND THEN WHEN NOBODY ELSE DATES HER SHE GOES CRAWLING BAK TO HIM UGH!!!