Answer: He feels like the horrors he is experiencing will last forever.
Explanation:
"Night" is Elie Wiesel's book in which he shares his experience in Nazi concentration camps (Auschwitz and Buchenwald) during the Second World War. The narrator of the story is Eliezer, a Jewish teenager.
The above-mentioned sentence suggests that the time passes slowly. Given the setting of the story, it is not surprising that the narrator has lost track of the time due to all the hardships that he went through. He feels that there is no end to the horrors in which he found himself.
