I think it's important to note that the narrator of this song isn't just "writing off" his ex. He's obviously frustrated and angry about the situation that she's in, and I agree that there's a strong element of ridicule in the lyric and delivery. However, there's also a pretty obvious plea for her to run away with him, evidenced in the stanza that ends: "I know you think I'm a young boy, but I'm good and I think we can make it." Naive and misguided as that plea may be (the narrator himself even tempers it with skepticism, noting that the woman is "only talking" when she says she's going to leave), he's definitely got some (probably deluded) notion that they could still be together. I think the key to this song is that the narrator's anger rises out of his ongoing desire for the woman ("I still want you at night"). In my view, the frustration of that desire prompts him to vacillate between commensurately desperate expressions of ridicule and fantasies of rescuing his former lover.
I think it's important to note that the narrator of this song isn't just "writing off" his ex. He's obviously frustrated and angry about the situation that she's in, and I agree that there's a strong element of ridicule in the lyric and delivery. However, there's also a pretty obvious plea for her to run away with him, evidenced in the stanza that ends: "I know you think I'm a young boy, but I'm good and I think we can make it." Naive and misguided as that plea may be (the narrator himself even tempers it with skepticism, noting that the woman is "only talking" when she says she's going to leave), he's definitely got some (probably deluded) notion that they could still be together. I think the key to this song is that the narrator's anger rises out of his ongoing desire for the woman ("I still want you at night"). In my view, the frustration of that desire prompts him to vacillate between commensurately desperate expressions of ridicule and fantasies of rescuing his former lover.