I don't know how to handle saying goodbye to an acquaintance who is permanently moving across the pond
Why do you think saying goodbye will be hard to handle?
I'll miss her. She was a very nice person who I could share my inner thoughts with.
I'm glad you at least get to say goodbye. It's not easy having your friends move away.
I wish I could get an immigration visa.
I don't know if you'd want to uproot your life like that just to be with an acquaintance. Think about all the other friends and family you would leave behind if you moved out of the country. I'm sure you can keep in touch with her by phone instead.