Harry:
His: He whistles at you whenever he sees you nearby.
~ Yours: You play around by taking off his glasses.
Ron:
His: He eats your food.
~
Yours: You ruffle his hair.
Draco:
His: He closes any book you're reading, especially if you've been reading it for a while.
~
Yours: You sometimes use his hair brush if you can't find yours.
George:
His: He playfully smacks your bum.
~
Yours: You wear his shirts.
Fred:
His: He plays small pranks on you.
~
You: You stare at him until he turns and looks back.
Neville:
His: He fake trips so you can catch him when he falls.
~
You: You don't have to do anything, he's always got his attention towards you.