@dashmount20, truthfully I don’t remember YT ever ranked them in her heart. Maybe I should share a bit more context that might help to answer your question.
This whole mission about making the shards fall in love with YT is an added plot in the show. In the book, the shards were 1700 years old. To revive YQ, the goal was to convince the three shards to be willing to sacrifice themselves for him. But they all fell for YT nonetheless. There was something special about her. The shards did not have all senses, but her physical touch made them whole, experiencing the world like they never could. And of course, they loved her for who she was as well.
YQ never cultivated in isolation for thousands of years. He was never forced to let go of his emotions or memories. That’s also just the show’s interpretation. Therefore, after he was revived, his personality remained the same, and he forever carried the four realms on his shoulders. That been said, he changed toward YT. After all, he was in love.