I think he is saying that he doesn't care what he has to do to be with this person - he will live, fight, obsess, just as long as he can share it with her.
He is going to 'hell and back' over her, and then he is saying all good things come to an end - all that shines turns to rust...
I think he is saying that he doesn't care what he has to do to be with this person - he will live, fight, obsess, just as long as he can share it with her. He is going to 'hell and back' over her, and then he is saying all good things come to an end - all that shines turns to rust...