2 years ago I followed my partner to a foreign country for his job (we still live there), a country I had never ever been to, very different from my culture, had no family or friends there, nothing at all. The first 6 months were awful. He was extremely busy and I was alone ALL the time, would eat dinner by myself several times a week, barely had time to speak to each other or watch a movie together. I had never felt so lonely and confused in my life. I felt pretty resentful too. It definitely challenged the relationship, but we were strong enough that we worked through it and now it's all good. The fact that they couldn't get through that as an engaged couple shows that they just weren't meant to be.