Eleven's Soulmate (An Eleventh Doctor and OC story)

The girl of his dreams
She wanted to be
But River got in the way
She didn't fear
It was made clear
She was Eleven's soulmate

She lived for years
Without a fear
Of what the future held
But Rory's left
And Amy's next
They left her feeling bitter

~How did a girl's initial hatred for the madman with a box turn into a deep rooted, romantic interest?~