In "The Long Way Down" by Jason Reynolds, Will's internal struggle about accepting Buck's ghost can be reflected in the themes of doubt and confusion present in the narrative, even if direct lines from poetry are not explicitly addressed. However, you can look for passages where Will questions the reality of what he is experiencing or feels conflicted about the presence of Buck.
While I can't provide you with the specific lines from poems in the book, you might consider lines that illustrate Will's hesitance or disbelief regarding Buck's ghost, showcasing his reluctance to accept the situation he finds himself in. Look for moments where he reflects on his feelings or questions the nature of what he is experiencing.
If you have access to the book, I recommend focusing on Will's interactions with Buck and finding passages where he expresses doubt or disbelief.