Why does Ron have a crush on Hermione?

[Berit Jakobsen]

No: HPFGUIDX 93869

Arya wrote:
I also think Harry would be the only person in Ron's eyes to be 
worthy of Hermione (if Ron didn't really decide he wanted/needed her 
for himself).

Berit replies:

Ron clearly thinks Harry is the only person worthy of, not Hermione, 
but a certain brown-eyed, red-haired girl... :-)

Quote: (After Ginny told Ron she ditched Michael Corner:)
"Ron looked highly delighted. 'Well, I always thought he was a bit of 
an idiot,' he said, prodding his queen forwards towards Harry's 
quivering castle. 'Good for you. Just choose someone - better - next 
time.'
He cast Harry an oddly furtive look as he said it.
'Well, I've chosen Dean Thomas, would you say he's better?' asked 
Ginny vaguely.
'WHAT?' shouted Ron, upending the chessboard..." (OotP p. 763 UK Ed)

Berit
http://home.no.net/berjakob/snape.html