I speak to some colleagues in similar positions. If you are working for a loco and not based where you want to be, particularly if you are in the middle of nowhere and don't speak the local language it can be difficult. Have a look for expat organisations and groups to try to widen your social life - you may enjoy the flying more if it isn't connected with an unhappy personal situation.
If you enjoyed the challenge of training, try to recapture it. You still have a lot to learn in terms of decision making and aircraft handling. Try to set yourself goals or tasks when actually flying - a number of manual/raw data approaches and departures each month to sharpen your skills. On landing, challenge yourself to meet the performance criteria and place the aircraft exactly on your desired touchdown point EVERY time and keep a record of how you do.
Distance learning is another excellent suggestion, as you can effectively do a lot of it at work while somebody else is paying for your time!