The song is not only about Miranda being there for Blake when he needed her it's about Miranda making him into a better person.
At the time I am writing this, the two are no longer together and have both found new partners. That does not mean that they love each other any less. God gave Miranda to Blake just as God gave Blake to Miranda, they were put in each others lives to better one another and even if doing so it meant that they would divorce and no longer be together, they still both seem very happy in their new relationships.
The song is not only about Miranda being there for Blake when he needed her it's about Miranda making him into a better person. At the time I am writing this, the two are no longer together and have both found new partners. That does not mean that they love each other any less. God gave Miranda to Blake just as God gave Blake to Miranda, they were put in each others lives to better one another and even if doing so it meant that they would divorce and no longer be together, they still both seem very happy in their new relationships.