While they aren't technically together, don't let Maddy hear that. Since they've gone their separate ways, Maddy has realized she loves Nate in her own unique way and she's started to think that he could be the only man for her. With Nate, it's totally unclear how he feels since his judgement is shrouded by the fact that Maddy has his dad's sex tape. They're matched in their will to protect each other, with Nate even sending a man that Maddy claims raped her to the hospital.
The only positive thing about this pairing is that they're aware how toxic they are, and it seems like that's healthier than lying to yourself.