I noticed that "had" is used a lot. Consider this article:
http://ezinearticles.com/?An-Alternative-to-Had&id...
I noticed as well that some of your paragraph breaks have no space between them.
I also noticed the exclamation point is used a lot. Once or twice in the story would be enough.
“Liana” barked Mr. Demphy, “Are - “Liana,” barked Mr. Demphy, “are - comma after Liana and in the continuation of a quote, the second part of quote is not capitalized.
weeklong - week long
day and the - day, and the
her, because of which she - her; she -
because of which - this is not needed.
“Ok, everyone! Gather - “Okay, everyone, gather
around, we - around. We - or - around; we
wish to cherish it,” - wish to cherish,” it mot needed
sunset” said Mr. Demphy, “Disperse!" - sunset,” said Mr. Demphy, “disperse!”
cute and most of all, - cute, and most of all,
say and in turn, had - say and, in turn, had
grumbling and it - grumbling, and it
Josh and Ariana! - Josh, and Ariana!
“Hey, Liana lets - “Hey, Liana, let's
with Katie, she was - with Katie, who was - or - with Katie; she was
sometime - some time
sight and I bent - sight, and I bent
“Oh…Aiden. What…are you - “Oh . . . Aiden. What . . . are you
“Er….same - “Er . . . same
promise” I said - promise,” I said
Its around here - It's around here
“Its this way” - “It's this way”