Try a therapist who practices cognitive behavior therapy. It is research based and works. Stop trying to look at the big picture. Take one day at a time. Get up, do why you can that day, go to bed. Get up the next day. Keep up academically. At the end of the day, doing well academically preserves your options.
Remember you miss your family because you were one of the lucky ones to grow up in a loving family. Your family misses you too. Everyone, you and your family, is required to try to be brave to get through this process of you building your own adult life. It’s a process. It takes time. It’s painful and involves grieving your childhood. It takes starting to notice and celebrate the positives that you will gradually gain as you individuate. It’s okay to text or talk with your family everyday if you need to. My daughter is a senior in college, she goes to school very far away from us because we live overseas. She and I text everyday, twice a day. It’s the way it has evolved for us. It helps us stay connected and miss each other a little less. However, even after three plus years we still have days when we miss each other terribly (like Thanksgiving).
You can do this!