Friendly Fire

I'm just gonna break it down into what I think each verse means:

I don't want to hear another word from you now I'd rather be wrong life is mostly what you don't see anyway so just look away but our shadows never leave us alone down the bad roads they will follow us faithfully home

• I don't want to argue anymore, if it'll end it I don't care if I'm wrong. Look away from me and live life. No matter what the past still remains and it always will.

you launched the assualt with the first cannonball my soldiers were sleeping I know that you thought it would never come down, down to the wire it's friendly fire

• You brought this on without my knowing. You thought it would never come to this. Friends killing friends.

in your room filled with the things that you've never done does anyone really care your shadow just wont leave you alone 'cos he knows well he knows what you've done

• You're living a lie, but no one cares. Still your past won't leave you because it is witness to your terrible deeds (launching the assault maybe?)

waves don't wonder when you're drowning under the sea so don't look for me find her keep her lose her deserts you in the end you were my friend like your shadow no one knows you as well as I do

• The masses won't care when you're struggling, so don't fall back on me. You go through so much together to have her just ditch you, you regret what she did because you did in fact like her. Just like her "shadow" you have grown to know her just as well.