After a year, you are probably stuck in the Friend Zone with the first girl, and if so, you don't really have a chance with her. You should have expressed your interest in her a long time ago and now she probably thinks of you as just a friend, and probably not as close a friend as the other girl. Is there anything wrong with the other girl, or can you spend some time with her to see if you might like her? Either way, if you're moving soon, it probably doesn't matter. At your age, it will be easier just to meet someone new than to maintain a long-distance relationship.
Good decisions come from experience. Experience comes from bad decisions.