I'm feeling unhappy whilst studying abroad, what do I do?

You re going through a normal curve in your career. I think you should persevere and see the remaining time through. It would be very helpful to have a chat with your uni's counselling team and get all the student support you can. You didnt say your age but even if you call it off now, you must one day need to spend time away from F&F so you may as well start now for a better tomorrow. Remember that some of these sacrifices and experiences are the reason why you earn more money than non graduates when you finish uni. Good luck.