How The Girls Got There

This story is about Astoria Greengrass and Ginny Weasley's unlikely friendship, throughout the years.
This includes some parts of the story, and some other things made up.
These are JK Rowling's characters.

It all started like this:

"Well, well looks like Potter's got himself an admirer." The black haired girl laughed at her own joke, as if it was the funniest thing in the world. Ginny turned as red as her hair, and looked sheepishly at her shoes. Before resorting with.

"Well, well looks like Malfoy got himself an admirer." She maimed the other girl. It was know Astoria's turn to blush. There eyes locked ferociously, but then hatred turned to amusement and they both broke into, wide Cheshire cat grins.

But something got in the way of the picture perfect ending that the girls planned.

When the boys fall in love with the wrong girls?