I think that this song is about a relationship that is doomed to fail and is falling apart. The house (their relationship) is burning and there is no way to stop it. They are realizing, now, at the end, how petty their other worries were, such as shutting the window. They were too distracted to realize that their whole relationship was crumbling. So, in the end, they decide to just kiss for their last few minutes together and make it last as long as possible by holding their breaths. But even though they are holding on at the end, they know that ultimately they will burn.
I think that this song is about a relationship that is doomed to fail and is falling apart. The house (their relationship) is burning and there is no way to stop it. They are realizing, now, at the end, how petty their other worries were, such as shutting the window. They were too distracted to realize that their whole relationship was crumbling. So, in the end, they decide to just kiss for their last few minutes together and make it last as long as possible by holding their breaths. But even though they are holding on at the end, they know that ultimately they will burn.