I haven't read all the replies here, but I would say no - its never "just" - even when nothing happens.
Men are never friends with women they don't feel some attraction towards unless they are gay.
Women often want to be just friends with men and dont have to fancy them.
I like being just friends - but almost without exception at some point during the friendship there will be some intimation of something more - usually this involves a tongue down my throat whilst I struggle for air.
(fifi - your avatar is beautiful. Can we be "just" friends do you think? )