It's the darkest night I've seen in years
Does it heighten your fears, cause it heightens my fears
^here, I don't think the "cause" is necessary, it would sound much better just like this i think "Does it heighten your fears, it heightens my fears" Do you see? :]
We think we'll end right here right now
You don't know how cause I know how
^Again the "cause" isn't necessary and doesn't do much for the lyrics
Poisoned all the air we breathe
Strangle hold on what we need
^Here i think you meant it to be "Strangled" ?
All the time in the world
Running out on boys and girls
And in my head all twirls

(Chorus)
Because we're kissing in the dark
I would hold on to your heart
Somebody might try to steal it, might try to steal it
Because we're kissing in the dark
Our lips are ripping apart
Cause of these dastardly feelings, dastardly feelings

Theres fire streaking across the sky
^"Theres" should be "There's"
And I don't know why, do you know why
Cause this is the age of apocalypse
And our hearts eclipse, yes our hearts eclipse
Now the human race is done
We all know who won
We know we came in last
Now we sit back and relax
There's only time to be passed

(Chorus)
So we're kissing in the dark
I would hold on to your heart
Somebody might try to steal it, might try to steal it
Because we're kissing in the dark
Our lips are ripping apart
Cause of these dastardly feelings, dastardly feelings

Goodbye my love
I'm gone again
Goodbye my love
This is the end
Fire and ash
They fill our lungs
Hold on so tight
And sing our songs

(Chorus)
Because we're kissing in the dark
I would hold on to your heart
Somebody might try to steal it, might try to steal it
Because we're kissing in the dark
Our lips are ripping apart
Cause of these dastardly feelings, dastardly feelings

This was well written, It wasn't your best, but you did do a good job I think :]