Hmm? This seemed pretty obvious. It connects with what Hermione worried about her life being over. The point is that what happens next is that everyone knows she really likes HJPEV. Given the standard attitude of kids in that age range what happens next is likely going to be lots of silly mockery.
Ok, that is somewhat reasonable. But ...
I would have thought that, even to children, Hermione's willingness to kiss Harry would be something like a willingness to apply CPR. It is something anyone would do for a fellow human, let alone a friend.
It is Harry's response to the kiss that provides evidence. Evidence of Harry's feelings for Hermione, rather than Hermione's feelings for Harry.
Update: This post has also been superseded - new comments belong in the latest thread.
The second thread has now also exceeded 500 comments, so after 42 chapters of MoR it's time for a new thread.
From the first thread: