To start magick isn't the answer, it's a parachute to help in difficult times, not to go 'I want a boyfriend poof, I want good grades poof, I want to be popular poof, I want to be rich poof.' Eventually the world will cave in. Stop. Casting. On. Him. If it's meant to be, it will happen. It might hurt now, but if you break up it might be best.
Talk to him now, you may love him and want him as your husband, but what about him? You don't really love him if you only consider your happiness. Perhaps he loves you but wants an open relationship, are you prepared for that? Maybe he wants a break to figure things out. You are both young, maybe he's not ready just yet. Whatever the decision, talk it out and look at the big picture. Heartbreak now is less destructive than in ten years. It could all work out, it might not, but a relationship takes work, it's two people working together, even in polygamist households it's a unit of individuals who care deeply for each other, you need to talk, not cast.