Hedy did have one friend, Anton, but eventually he became a conscript in the German Army. Hedy had promised Anton that she would look after Anton's wife while he was away. As she was able to read German and English, Hedy had a work as a translator for the Germans. At least this meant that she had a little money to help her survive. Part of Hedy's work was to distribute petrol rationing coupons and she began to save a few for the local doctor so that he could continue to visit patients on the island. This, of course, had to be done in strict secrecy. Then she met a young German officer who was sympathetic to her situation and who risked his life to help her when she was in danger.
The Girl from the Channel Islands by Jenny Lacoat is based on a true story.
Two other books about living in the Channel Island during German occupation are Dancing with the Enemy by Diane Armstrong and The Guernsey Literary and Potato Peel Society by Mary Ann Shaffer & Annie Barrows.