Harry and Hermione are very platonic friends. But I won't answer for anyone else, nudge-nudge wink-wink!
I hope it is not necessary for me to stress the platonic nature of our relationship- not platonic in the purest sense, there was no philosophical discourse, but we certainly didn't fuck, which is usually what people mean by platonic; which I bet would really piss Plato off, that for all his thinking and chatting his name has become an adjective for describing sexless trysts.
There's something so great about platonic intimacy.