You have my sympathies, and please surround yourself with friends and family, even if that means taking a short vacation home. When you say that your are entirely dependent on him, what does that mean? Are you saying "emotionally," "socially," and "financially" or some combination of this? If it is any one of these or a combination then this, in and of itself, is a sign of dysfunction.
The other major red flag is that you seem to have been caught unawares . . . had no clue that his feelings for you had changed.
What I am saying by both of these statements is that though you are devastated right now, and potentially trying to figure out a way to reconcile or feel extreme despair, I am telling you that in the long run, even as soon as a year from now, you will realize that this is the best thing that could happen . . . IF AND ONLY IF . . . you learn something from the failures . . . from how you let yourself become so dependent on him, and lost yourself in the process.
The final thing I will say is that you should never reconcile, ever. Even if he comes back weeks, months or years from now saying he made a mistake. He may do that, but you now know that he does not actively work together to solve problems, or even give you insight into what he is feeling or thinking. If you were to reconcile, there is a strong likelihood that years from now, when you potentially have been married and with kids, the same thing will happen when he internally muses that he is no longer happy, or meets someone at work, or wants to have his freedom in middle-age.
The stakes, while they seem high now, because you have 8 years invested in the relationship and live in another country, are really so much less than if you had children.
One day, when you have healed, you will date again, and remember to never relinquish your independence emotionally, socially, financially. Keep your friends. Keep your career. Keep your aspirations and goals that were forged a part from the new guy that one day will join your life. Something tells me that you conformed everything about yourself to your fiance's goals and lifestyle, and you lost yourself along the way. You stopped living for yourself, too, and put him at the center of everything, in a way that caused you to cease to be the person he first met. Women do this a lot. Women are conditioned to always place themselves second to everyone else. Do not make that mistake again, and you will find that you regain your confidence, your boundaries and your autonomy, and as a by-product, your happiness.