Answer and explanation:
By definition, mood is the atmosphere created by an author in order to provoke certain feelings and an emotional response in readers. Setting, imagery, and diction are very helpful in creating the mood. Words that define the mood of a literary work are usually associated with feelings: happiness, fear, tranquility etc.
In the paragraph we are analyzing here, the word choice helps create the anxious and regretful mood. The narrator stutters when talking to another character, not being able to apologize properly. We can tell he feels sorry for something that was said at 2 a.m. He regrets having even suggested a certain idea, and is nervous about being forgiven and understood by Jolu -- "Listen Jolu, that was really stupid of me. I did it at like two in the morning. I was just crazy when it was happening. I—"