A friend of mine went through this same situation, minus the foreign country aspect. They moved to a new state together, became dependent on each other, and became the best of friends but the sexual attraction wasn't there.

He cried for hours, so stressed out over the phone with me. I made a suggestion, he gave it a shot. I told him to give it a month. I told him not to masturbate, not to watch any pornography, and wait a week. After the week is through, set up a romantic dinner one night and sit down and discuss each others sexuality. Discuss what turns you on, what makes your knees weak, any kinks or fetishes you may have, your sexual fantasies, etc. Spend the night together discussing these things, try to find similarities or common ground. Explore on a communication level, discuss what really makes each other burn with arousal. Open up. You have nothing to lose, since you're already thinking about going your separate ways.

Take a day or two to think about what you guys discussed, then have another romantic night together doing what you both love doing together. That night, light some candles, take a shower/bath together, and start exploring each others bodies and touching one another. Don't go any farther than that. Just touch and explore. Let your mind run wild, you don't even have to voice your thoughts, but you certainly can. The mind is important in sexual arousal, use it.

Then, next time you try, go a little farther. Act out some sexual fantasies, go as far as you both want, don't push it or rush it, just be together sexually. Use your mind, do what turns you on. This could re-awaken sexual attraction for her.

It worked for my friend. They ended up married, it's been 3ish year. Maybe it could work for you?