Taking Back Sunday - Cute without the E Lyrics Meaning

I'm going to dissect every line in this song. Its long but OH so worth it.

Your lipstick, his collar.. don't bother Angel
I know exactly what goes on
-he sees the person she's cheating with, sees proof. Tells her not to bother explaining/excuses, that he knows

When everything you'll get is
everything that you've wanted, princess
-he does all she asks, 2nd nickname showing his love for her
(well which would you prefer)
My finger on the trigger, or
(me face down, down across your floor)
Me face down, down across your floor
(me face down, down across your floor)
Well just so long as this thing's loaded
-if she would rather, he would kill himself, he's not in the best state of mind, willing/wants to shoot himself

And will you tell all your friends
you've got your gun to my head
-tells all that she controls him/she holds the power
This all was only wishful thinkin,
this all was only wishful thinkin
-relationship can neer work out, he just really wants it to

Don't bother trying to explain Angel
I know exactly what goes on when you're on and
-2nd Angel, reinforcing he really knows
How about I'm outside of your window
(how about I'm outside of your window)
-he is watching her to check his suspiscions
Watchin him keep the details covered
You're such a sucker (you're such a sucker)
for a sweet talker,
-hes doing what he can to hide it, possibly the guys friend, she falls for anyone who is "a sweet talker"

(the only thing that I regret is that I, I never let you hold me back)
-wishes he had never let her find out what was happening, possibly meaning she wanted to be caught

Hoping for the best just hoping nothing happens
A thousand clever lines unread on clever napkins
I will never ask if you don't ever tell me
-he doesn't truely know what is happening, and doesn't want to know. He's been writing/thinking about this for along time so he has always known something was up

I know you well enough to know you'll never love me
-knows that it wasnt true love

Why can't I feel anything
from anyone other than you?
-he truly loves her and even after what she has done, he still loves her just as much

And all of this was all your fault
And all of this
-repercussions are her fault

(I stay jealous)
I stay wrecked and jealous for this,
for this simple reason
I just need to keep you in mind
as something larger than life
-he holds it against her, still loves her after it ends
(she'll destroy us all before she's through
and find a way to blame somebody else)
-between the cheated and the cheatee, saying that she will ruing both of them and to find a way to make it not their fault

this is my favourite song. I hope I did it justice I tried my best.