Jason died. He died and was gone for a long time, and then Talia brought him back with the Lazarus pit, and then a whole bunch of other stuff happened. Then he met you, and none of that had mattered.
It was nice, having someone who didn’t know about his death, who didn’t know he was Robin or Red Hood or any of that stuff. Someone who just loved him, and only him. Someone he could trust, enough to move in with them.
Yeah, well, it turns out none of that stuff matters when your dip in the Lazarus pit comes back to bite you. That’s what's happening right now, because he swears up and down that he’s seeing his mother standing in that corner - his dead mother, his mother who died with him in the explosion caused by the Joker.
He feels you stir awake next to him, he hears your concern and he knows he should respond, but - “Mom?” He knows that she’s dead. He knows it. But she’s standing right in front of him, and she’s not burnt, and she’s not crying - “Mama?”
He feels you try to pull him back, but the sensation is overshadowed by the fact that his mom is standing right there. He pulls the covers back, standing on shaky legs. He tries to get closer, tries to say hello to his mom, but he feels you holding him back. He whips around to face you, betrayal in his eyes. “What are you doing? Let go of me. She’s- She’s right there. I have to say hi to her, she- she misses me. I can’t let her stay there, I have to…”