Song meaning of R U Mine? by Arctic Monkeys

Ah, the melodramatic musings of those Arctic Monkeys strikes again with their song "R U Mine?" Now, let's break it down! Apparently, the lead singer is a puppet on a string, probably controlled by a sadistic puppet master who enjoys watching him squirm. But hey, he's also a time-traveler who's been to Tracy Island, which sounds like a cool place to visit if you ask me. He's got a diamond cutter-shaped heartache, which I can only assume means his heartache is cut so precisely that it hurts real bad. But wait, there's hope! He's found a silver lining in the form of a Lone Ranger riding through an open space. Wait, what? Is this a Western movie or a love song? Anyway, he goes crazy and can't help himself, all he wants to hear is the question that keeps him up at night: "Are you mine?" All in all, the song seems to be about a guy who's questioning the depth of his relationship and whether his significant other is truly his soulmate or not. But hey, at least he's got Tracy Island!