Right? Even if Ron and Hermione wouldn't work out (which I don't think is true, I just think there was a huge chunk of DH where Ron wasn't there that makes the Harry/Hermione relationship look a little played up), Harry and Hermione just… are not into each other at all and never, ever behaved as if they were. I mean, ever. They are very close friends who need each other in their lives but have no romantic interest.