To me, it sounds like he gets dumped in the first verse.
'Oh god, Oh god, she's really done it now' - He knew the relationship was ending already.
'Coked up, her body's all spun around' She's walking away, and she's crazy for it.
'And seeing her just isn't something I can stomach' -He's hating her for what she did, and can't stand to see her.
Pre Chorus - Him telling himself that he won't put up with all the shit she put him through
'This ain't a love song...' He's serious, he doesn't want her back, he's not just hung up about being dumped.
'So tell me baby, pretty baby, that this house is not a graveyard' - 'So Tell me that our love isn't dead. I don't believe you.'
'Tell me how to stay strong and carry you home,' - 'Tell me how I can forgive you'
'Over corpses of her long-lost fathers and her unborn daughters' - The life they could have had. Which she killed.
'God dammit, I just can't do it alone' - pretty obvious.
Second Verse - Him trying to tell himself he's better off, she was just a whore anyways.
Third Verse - Him telling himself, that he did nothing wrong, because it's easier to blame her.
To me, it sounds like he gets dumped in the first verse. 'Oh god, Oh god, she's really done it now' - He knew the relationship was ending already. 'Coked up, her body's all spun around' She's walking away, and she's crazy for it. 'And seeing her just isn't something I can stomach' -He's hating her for what she did, and can't stand to see her. Pre Chorus - Him telling himself that he won't put up with all the shit she put him through 'This ain't a love song...' He's serious, he doesn't want her back, he's not just hung up about being dumped. 'So tell me baby, pretty baby, that this house is not a graveyard' - 'So Tell me that our love isn't dead. I don't believe you.' 'Tell me how to stay strong and carry you home,' - 'Tell me how I can forgive you' 'Over corpses of her long-lost fathers and her unborn daughters' - The life they could have had. Which she killed. 'God dammit, I just can't do it alone' - pretty obvious. Second Verse - Him trying to tell himself he's better off, she was just a whore anyways. Third Verse - Him telling himself, that he did nothing wrong, because it's easier to blame her.
Wow, that dragged on, and it's only a guess.