I personally am not a fan of relationships with a clear expiration date because I think it just extends the sadness and makes it harder to move on. If you’ve already decided to break up in the very near future, what will it hurt to break up earlier, especially if you won’t even be near her for a lot of the remaining time in the relationship? 

You’re allowed to leave a relationship anytime you feel it is best for you, regardless of what you previously agreed. If you no longer think the relationship is working for you and making your life better, it may be time to end it. I don’t think it’s selfish to want to go to Sweden single, especially given the issues you mentioned and the fact that you do intend to break up soon regardless.