I can relate to your pain. I first married 3 days before turning 19. Four years later, I was hoping to get hit by a truck so that I wouldn't be stuck in that horrid marriage. Got involved with someone I knew from childhood and left my marriage...best thing ever...didn't stay with that guy though, we both knew it wasn't permanent. It is encouraging that your parents still talk to you. It can be lonely when you are first DF'd, but you are still young and have the ability to make friends outside of the reach of the organization. Friends who won't base their friendship with you on how many hours you get in Field Service, but rather people who like you for you. Try to make new friends, make overtures to people at work, ask them for coffee, go to gatherings, museums, events. Paint on a smile even if you are miserable, there is some proof that your mood follows your facial expressions. (See the book 'Blink', it has interesting discussions on this).
Wishing you the very best.