first of all, its none of your business
second of all, you like her, is it? and you must be jealous and
furthermore, she is old enough to make her own decision, who is she
mixing with?
and this is nothing serious at all
and this is her own life, she has the right to do whatever she
wants, so mind your own business, you are not her parents, or
related to her
as a friend, either you could comfort her, when she wake up from
her lalalala dream, or annoy her
if your problem is so serious, then let me tell you something
i have a friend, who is already so negative in life, that she tells
me, that she fantasize her mum death and she is a hikkomori and she
doesn't know the meaning of life anymore, and she has suicide
record
to be honest, mind your own business, if she realise that the guy
is just fooling around with her, i am sure she will wake up her
idea
and nowadays, teenage need to learn a hard lesson before they learn
to grow up
this is just another form of jealously that you are showing,
goodness, i think you are just darn 17 years old