SEN_brasileiros come

I see, but that doesn't explain much since she also took the initiative, so there's no exploration at all.

I just think that there's a huge difference between people on high school x people on university in US, in Brazil there's not that much at all since here is pretty much common to people around this age to be friends, for example people around 15-16 do some "course training" to SAT (in Brazil is called ENEM) with other people around 18-23y.
So it's very common for people to have friendships at these ages, I can already see that this is something quite impossible in the United States since normally you won't be in the same environment as someone that age.