Back then, he had such strong feelings for his wife. However, because it happened so quickly - he quickly realized his own flaws and shortcomings. The two of them took their time and circled around one another before falling in love and starting to date. His relationship with Setsura is different. Akito felt like he had feelings for her from the moment he saw her. It sounds cliche, superficial, and stupid. However, he knew.
'I've already given up.'
Akito wonders if Setsura remembers one of their first conversations. During one of the first nights, she came here, during her breakdown. Setsura told him such words. It pained him whenever she said such things. They weren't even close then; she only came. The girl's words shouldn't have meant anything to her.