How to move on

so ive been liking this emo girl for the past while well since high school started and she's gonna move soon but the thing is she knows how i feel and sh has already rejected me twice but for some reason i cant stop but to still like her ive tried every thing meditation getting with another girl and more but i just cant seem to forget about her but i know she is a bad person because of her past is thier anything i can do to forget about her or what should i do 😞 but tbh i think i got a third chance 😉