Anything can change. Your feelings toward him can change or his feelings toward you can change, you know that. But your desires can change as well! Maybe you'll really love it there, maybe you'll realize you are getting more out of that situation than you would if you had gone elsewhere, maybe you'll hate it if you don't go with him. You never know. you might end up choosing based on simply whether he is more important than the perfect career. Neither option is an overwhelmingly better one.
Personally, I don't think you should follow him. You know what you want to do, and around where you want to go, and because you're dating you shouldn't change that. I mean, you could continue the relationship which would be tough, but ehh, I don't know.
you're (saradotcom) on to something here...why should you have to switch your life to fit his plans when the relationship is barely developing...not to say he's not a major part of your life if that's the way it actually is but if it does last regardless of distance, then that's something worth keeping...don't move on just yet.