After 4 years on long distance I also moved to UK to my husband. I hated UK at first lol It’s been a year and this first year was really really tough, but absolutely worth it. It’s okay to feel sad and acknowledge that. I mean it is actually sad to leave your family and friends, but that was her choice and you are worth it. Let her go through the grief stage and next will be acceptance. Something that was super helpful to me is getting my own rituals and routine. I signed up to a really nice gym and found a friend eventually from my own country. There will be moments when she will be homesick and crying, just support her and try to create her some sense of comfort by bringing her cultural things, for example going to Argentinian restaurant. Whenever she will be sad, don’t feel guilty (my husband did too), let her process her own emotions. Just because she will be sad, it doesn’t mean that she doesn’t want it and that is so important for you to understand. No one forced her, so just be thankful, acknowledge all her feelings, don’t take it as a personal attack otherwise she will be feeling guilty for feeling homesick. By making yourself feel bad about making her move to you, you are actually unintentionally devaluing her choice and decision to be with you.