I'm really scared the girl I love is going to leave me... Help!! What should I do?

Buddy, don't mess with fate! If it's meant to be, then it will be, if not, let that happen as well. Just enjoy what you have at the moment. It might last, but if you keep worrying about it, it will show and make likfe miserable for you both. Just be happy and Pray that it works. Trust me, what's best for you sometimes isn't what you want or expect. Think it through.