I think it's a song about a breakup, too, but to me it feels like she's the one "talking too much", she thinks she seems to be unsure about their relationship and thinks she needs some time, so she asks for it.
He, on the other hand, has already accepted that the relationship is over, or maybe he's can't put up with the situation anymore, so he just ends it in a definitive manner.
I think it's a song about a breakup, too, but to me it feels like she's the one "talking too much", she thinks she seems to be unsure about their relationship and thinks she needs some time, so she asks for it.
He, on the other hand, has already accepted that the relationship is over, or maybe he's can't put up with the situation anymore, so he just ends it in a definitive manner.