The Outsider by HP Lovecraft

Reread lines 118-133. What impression do you form of the narrator's mental state? In what way does his unreliability create suspense? Cite explicit textual evidence in your answer.

THE THING BELOW IS NOT THE SAME STORY AS THE ONE THIS QUESTION IS ABOUT. I JUST HAD TO PICK A RANDOM ONE BECAUSE IT DIDN'T HAVE THE SPECIFIC STORY I WAS READING