i think songs can be interpreted in different ways, depending on listeners. To me personally this feels like a song about suicide. Like the narrator has millions of reasons to end their life, but just one good reason to not do it would be enough for them to keep living.
the other, more likely, interpretation is that the narrator is contemplating whether or not to leave their significant other, who is giving them good reasons to, but the narrator wants the so to give them at least one reason not to.
i think songs can be interpreted in different ways, depending on listeners. To me personally this feels like a song about suicide. Like the narrator has millions of reasons to end their life, but just one good reason to not do it would be enough for them to keep living. the other, more likely, interpretation is that the narrator is contemplating whether or not to leave their significant other, who is giving them good reasons to, but the narrator wants the so to give them at least one reason not to.