Let's go through them one at a time. You wouldn't pick Sentence One. It is part of the setting and it suggests a subdued response to what's around him. But for all we know, Fitzgerald could be leading us somewhere else. This setting is a suggestion, it is not an exact answer to his mood. If we take him seriously we'll keep the suggestion in mind, but there are better answers that reflect what he is thinking.
Sentence Two Sentence Two can't be any plainer. We don't know what it is that he has lost. Whatever it was, there is something final and deep about it. If someone fades right before your eyes and that someone is your mate, it is devastating. It's a real downer.
Sentence Three What else can you say? The loss of a dream is every bit as bad as the loss of a person. (Well maybe not quite, but it is close).
Sentence Four It sure has. He doesn't feel right. Whatever was taken doesn't make him feel good.
Sentence Five He confirms what I've said in sentence four with this sentence. Whatever he's thinking, his physical response shows that he's near tears. The only reason you wouldn't choose it is that the sentence is like one. You have to pay attention, but we see the outside of him. Not the inside.
Same with six. Six is an expansion of exactly what she gives him. And it's pretty physical. But his melancholia is responded to in other places. It confirms the things that he sees that makes him nuts about her, but there is a real sadness in those lines. These memories are quite poetic and if you were writing an essay, you could really do something with them.
I think I would chose 2,3 and 4, but if someone put six as an answer, I could sure buy into that.