To me, the last verse sounds like she's in a fight with her boyfriend. They're having problems in their relationship, the emotional distance feels great, but she wants to make up with him. She wants her and her boyfriend to gain a perspective where they see the problems in their relationship as small and see the emotional closeness they share.
"Depending on which map you use" refers to her uncertainty that he is willing to see things from the perspective she wants, willing to pilot that plane with her. He might still see their problems as huge and the distance between them great. She's reminding him he has the choice to see things differently, to see their fights as pointless and to see his fears (of commitment? of whatever they might be fighting over) as petty.
To me, the last verse sounds like she's in a fight with her boyfriend. They're having problems in their relationship, the emotional distance feels great, but she wants to make up with him. She wants her and her boyfriend to gain a perspective where they see the problems in their relationship as small and see the emotional closeness they share.
"Depending on which map you use" refers to her uncertainty that he is willing to see things from the perspective she wants, willing to pilot that plane with her. He might still see their problems as huge and the distance between them great. She's reminding him he has the choice to see things differently, to see their fights as pointless and to see his fears (of commitment? of whatever they might be fighting over) as petty.