Welcome to the forum. This is a supportive forum full of kind people.
It can be difficult coping with moving to a new town or a new state let alone a new country.
I can understand when you work at night and your boyfriend works all day that it is hard to spend time together,
At the weekends when you are both not working do you get a chance to spend time and relax together, or can you go for a walk together.
I am wondering if you could some volunteer work during the day time and /or spend time on a hobby or something that interests you.
I wonder if writing down your thoughts in a journal may help. I overthink a lot and have trouble sleeping but I try hard to write down my thoughts so they are on paper and not in my head.
Your boyfriend sounds very supportive and is aware of your feelings of isolation and unhappiness bout where you are leaving.
I find just going for a walk during the day you will meet people even if it is just to smile and say hello at first.
I often talk to people who are gardening and the like to talk about their plants.
Thanks again for taking the time to write a post and share your story.