Dess' fate and the Weird route

It was widely accepted that Dess disappeared and/or died.

But I the weird route, Noelle says "...Dess left". As In she did it intentionally and more importantly that Noelle knew she did so.

Do you think this means anything? Or was Noelle just talking crazy ?

Did Noelle maybe just gaslight herself that Dess left in the same way Noelle tries to leave in the Weird Route? Or did Dess actually do that?