How do i do about this girl?

theres so much to say,but ima make it short,theres this girl ive been talkin to for bout 3 months,and weve gotten very close.She alreadi want me to be her future,etc.but shes moving back to gergia,cause of relationship issues,where her family is,and also shes goin to school out there.im gonna truly miss her,we txt everyday,and shes crazy about me.She alreadi told me,if she breaks up with her bf,IM GONNA BE THE ONE.her bf is down here,but wants her to move back,and she knows its not about school,but other iissues,hes cheating,etc. So i told her,i hope she finds someone good,she keeps tellin me,be positive,CAUSE ALL SHE WANTS IS ME...so in a short paragraph,i dont wanna lose her,but shes going back to atl for good...i dont kno what to do,wait on her...or let her go...cause were both crazy bout eachotha...im 19,and shes 18,and she has no family out here...so HELP!!!