Trauma can be overcome, so she should be coming out of her shell more and more as she gains confidence.
Still the MC doesn't do nearly enough to make her more confident in embracing a relationship, he had opportunities, but he just doesn't... almost like Nyx is waiting for something... Like
xapican said she's probably waiting for the complete resolution of the Ethan to do it.
Until then, in the immortal words of
MrD812 , expect more "Beta-Boy shit" lol.
It didn't need to be like that, but that's the way Nyx chose to go...