First of all this is a really lone interpretation.
i think this song is about a guy (lets call him bob,to make it less confusing) catching his girlfriend (who he lives with)cheating on him with a close friend of his own,exept his girlfriend doesn't know that he caught them,since he just kept it quiet and didn't confront her.
First of all in the song it shows how bob felt thinkin about the girl and his friend when he first found out about them."well it rains and it pours when your out on your own"
and then bob gets angry at her and tries to make an excuse to sleep somewhere else than the bed they share (which is the place he caught her cheating).so bob just tells her he wants to sleep on the couch "if I crash on the couch can I sleep in my clothes?"but then she see's that bob looks upset,and ask him why he's upset,but bob lies and just says he's been dancing all night (which he actually was until he came home early and saw his girlfriend cheating)and he's drunk."well I've spent the night dancing I'm drunk I suppose."and then she (relieved) laughs about it because she thought bob caught her cheating,and bob just laughs to fit the moment even though he really isn't happy."if it looks like I'm laughin I'm really just askin to leave"
and after weeks of her continously cheating on him "without him knowing",bob finnaly goes crazy with angry after holding it in so long,and gets the idea to kill his girlfriend infront of his friend(who is the one having the affair with his girlfriend).so one day his friend arrives at his house after he invites him.the friend gets in the house and see's that bob's girlfriend (the girl the guy was having an affair with)"This alone your in time for the show"and then the friend see's the crazy look in bobs eyes and instantly knows what he's trying to do."Youre the one that I need,im the one that you loathe."and then bob,see's that the friends gonna try and fight back,but this only makes him crazier and angrier "you can make me corrode like a beast in repose,because I love all the poisen."and then he says that he isn't the little boy he used to be (probably a past reference to the times they used to have together when they were little)."and away with the boys in the band"
so bob tells his friend how their affair was hell to him "and I've been on a bender and it shows"so bob gets out his gun and points it to his girlfriend to show that if his friend tries to fight back he'l just kill her "so why don't you blow me a kiss before she goes?"
bob then gets hit with reality,and realises what he's doing.but he figuires he's too deep in to get out now,so if his friend tries to fight,he would still shoot his girlfriend even though inside he wouldnt want to."give me a shot to remember"and bob just keeps lying sayin that if his friend fights back he'd be doing bob a favour saying he'd just take the pain away."and take all the pain away from me"
but inside bob just wishes this could all end with an apology "a kiss and I will surrender",but bob realises he's too deep in to get out now,and he can't think of a way out of the situation "the sharpest lives are the deadliest to lead".bob realises that this is the biggest thing he's ever done "a light to burn all the empires"its so big that he's ashamed to end it so easily."so bright the sun is ashamed to rise and be"and then bob thinks that his friend is the one that made the first move on his girlfriend (causing his girlfriend to fall in love with him),sucking his girlfriend in with his charm."in love with all of those vampires"and then he gets the idea to kill his friend instead and letting his girlfriend go (leaving her lonely and depressed) so she can knows what it was like to feel abandoned "So you can leave like the same abandoned me"
so then bob finnaly loses the last straw and goes crazy,and shows his real colours."theres a place in the dark where tha animals go.you can take off your skin in the cannibal glow"so then bob points the gun at his friend and shoots him continously,mocking his girlfriend assuming that she lived her life under the gun anyway with all that pressure she had to keep the affair a secret."juliet loves the beat,and the lust it commands".his friend,just having realised what happened to him (after shock) dies."drop the dagger and gather the blood on your hands.romeo."
