she's not looking for a friend, shes looking for a relationship at her age. Women just say that crap to start off as friends first or to have a gaggle of men they talk too.
As I always say 500 msgs, but like 485 just want sex, 15 may actually want to date or get to know her on a non sexual level first and she may only find like 2 attractive.
getting so much messages mean nothing, majority of men just log in search an age range and send a generic message to everyone, and see who bites.
This is why I don't even mess with online dating sites/apps and when I did i just let these chicks msg me first.
Real life is so much better.