Montag had a weird but thoghtful conversation with Clarisse. Taking into account how Montag fell after the conversation that he held with the girl, answer:
Why does he feel that at the end he was not happy?
Was any person at the dark bed? What was it?
What does he think aboout the meeting with Clarisse?
he is not happy because of what he faces day by day since his wife has problems with pills and his lack of marriage and love begins to affect him, just as it was possible that books were banned and whoever did it had to pay , it was a sad world that he lived.
I think that the conversation he had with Clarisse was something sudden and curious since Montag was attracted by her interest and curiosity about things about him and his life, apart from being a person who cared or with the simple fact of saying, are you happy?