I like to think that this is a song about new love. I think the narrator has just met someone new, and this person makes him feel like he is on top of the world, contrary to what he may have thought before.
I think that in the last two verses, he is saying that he will protect what they have recently acquired. Moreover he will protect this girl from whatever dangers lie ahead, "All safe and sound, I won't the let psychos around". "I'm in a state, I'm in a state Nothing can touch us my love" just means that he is so madly in love with this girl mothing can bring him or her down.
I like to think that this is a song about new love. I think the narrator has just met someone new, and this person makes him feel like he is on top of the world, contrary to what he may have thought before. I think that in the last two verses, he is saying that he will protect what they have recently acquired. Moreover he will protect this girl from whatever dangers lie ahead, "All safe and sound, I won't the let psychos around". "I'm in a state, I'm in a state Nothing can touch us my love" just means that he is so madly in love with this girl mothing can bring him or her down.