The truth is that this happens way more than it should. It happens to girls who are fresh out of high school and I still see it happen to girls who are in college. I can understand why girls do this, but I still fully believe that you should never a follow a boy. Ever. And here's why.
I'm a strong believer in everything happens for a reason. I trust that everything will work out the way that it's supposed to. If your relationship is as strong as you think it is, then long distance will not be an issue. If you really think that the only way to be with this boy is to follow him to his college or to his post-graduation job, then you shouldn't even be together. Your relationship should be strong enough to where you can both survive and be independent, even while being miles apart from one another.
If you forget all of your future plans just to follow a boy, you are making a mistake. To quote Tiny Fey from Mean Girls, "I know having a boyfriend might seem like the only thing important to you right now, but you don't have to dumb yourself down in order for a guy to like you." In this case, you don't have to give up your dreams just for a guy to stay with you. If your boyfriend threatens to break up with you because of the long distance, then show him the door because you deserve better.
Like I said, everything will work out the way that it's supposed to. Don't limit yourself to stay in the comfort zone of your boyfriend. If you're really meant to be together, you will handle whatever is thrown at your relationship. And if it doesn't work out, that's okay! There is another boy (who is going to be WAY better) waiting for you in your future. Chase your dreams and focus on your wants, and the rest will fall into place. I promise.