Shood i stay with best friends with her ?

ive been best friends with her for about 9 years now and i love her to bits ! but last year we just came into 1st year and she met another girl who i dont like and she doesnt like me either ! but somtimes i just feel like she likes her better but wen she just with me she says that she likes me way better but if weer all together she kinda egnors me !and i remember in primary people tryd to split us up an we hated it and ino i dont like this girl but ive thought alot about just finding another best friend because they must have somthing spiecial too but ino i could never find a best friend like her but i dont want to get in the way ! and after a while our friend ship might end in a fight and i dont want that to happen ! its just not the same as primary ! ive talked to her about this but she says shes not choosing bettween us and i can understand that but i hate it !