Is it haram to have friends of opposite gender of neighbours and in school?

Assalamualaikum, i am actually student in school, i actually have some female classmates of mine who i usually go for study related stuff and i also give them my work if they need it, i don't have any kind of haram intention about them and we only talk in school snd never any other place only except if they need my notes and i also have a friend of opposite gender who is my neighbour, she's been my friend since we were 3 years old because we were neighbour, is this friendship haram