tbh I suspect she kindof did a few times when they were younger (and Asuka's social skills were still utterly terrible) and it was disastrous but there were only two Eva pilots so they got stuck working together anyway.

And Asuka has basically gone beyond 'denial' into 'aggressive campaign of not thinking about it whilst basically doing it anyway'. Because she's still kind of a socially incompetent asshat and nope can't have feelings for the idiot four-eyes nope this is just normal camaraderie and they trust each other with their lives and everything else they care about and nope no feelings here nope ps I'm ill hug me.

In short, she dumb.