I don't necessarily agree with the suicide idea purely because both greg and mklyrics's suggestions make sense when you read the lyrics but greg's idea of not being able to see would fit with the theme of the album more; Open, Shut your Eyes, Chasing Cars, and a couple of other references to what you choose to or want to see in a relationship make me think it;s probably about someone lighting the way.
I don't necessarily agree with the suicide idea purely because both greg and mklyrics's suggestions make sense when you read the lyrics but greg's idea of not being able to see would fit with the theme of the album more; Open, Shut your Eyes, Chasing Cars, and a couple of other references to what you choose to or want to see in a relationship make me think it;s probably about someone lighting the way.