Per 
Important Note: When writing dialogue, use a double apostrophe ("these")
'Thanks Lena, but I think I'll be fine for a while yet
I would strike yet out.
fully engrossed in the sickeningly sweet routine that couples (are wont to doz) at gatherings.
I'm not sure what this is supposed to say.
facing out towards the sprawling forests and rivers,
Weren't we in the city? I think this is fine to leave though.
'Hey, there's some a plane coming from the West!
Strike out the a
In the distance, the sleek metallic shine of a plane glittered under the moon's light.
Maybe try plating, I think it may be a bit more of an appropriate adjective.
However, the customary roar of engines and flashing wing lights were strangely absent.
I think striking this out will create a more eerie feeling, as it's stated as a simple observation which then the reader will recognize as abnormal.
before it crashing into a nearby parks.
Make parks singular
Wings and engines tore away in great shrieks as the fuselage folded and snapped, fuel lines ruptured and ignited, surroundings bathed in the pale orange of flame. Roland could only stand and watch, stunned to the carnage unfolded before him.
Add a period after snapped. Capitalize the f in fuel accordingly.
his head at the noice that
Correct this.
but Lena put her and
So clearly you mean hand.
Within a couple minutes, the looters had passed, and (they) resumed their rush down the streets in search of safety.
Add the word in parentheses.
still left in his hearing.
Recommend changing to ears
was able to hear
I would change this simply to heard
'I only hope he didn't suffer.'
I think it would be more haunting if you made this into a question. Example: "Do you think he suffered? Did he even have time to realize-"
Something like that.
