She had something she needed to talk about, but if she actually put it into words, the facts contained in the "something" might irretrievably become more definite *as* facts, so she wanted to postpone that moment, if only briefly.

“In the instant Miu touched her hair, Sumire fell in love, like she was crossing…”

“I can bear any pain as long as it has meaning.”

“Everyone, deep in their hearts, is waiting for the end of the world to come.”

“We never choose anything at all. Things happen. Or not.”