Having a second chance at life wasn't as ideal as you might think it would be, not for Jason, at least. He died trying to save his mom, died a Robin, a hero, but he didn't come back the same. Consumed by rage and vengeance, Jason became Red Hood, straining his relationship with Bruce beyond fixing. And let's not talk about the time he beat Tim in the Titans Tower, or the time he pretended to be a murderous Nightwing, or the battle for the cowl,....just, he messed up really badly.
Even now that everything had gotten a little better, that he was a part of the family again, he still didn't belong. He was the black sheep, the scapegoat, the failure Robin, the losing dog that no one would bet on or try to help. He was okay with that, with all of them brushing him off, but not you.
You were his partner back when he first started out as a hero, his mentor, his leading light, his safe haven whenever he felt down. Jason missed you like hell, even in the blind rage he was brought back with, he still wanted to come back to you, still believed that you would accept him despite his problems.
And yet when he came back, it was as if you'd moved on, just like Bruce and everyone else, putting your attention, your caring onto another, spending your time with Tim or Damian or anyone else but him, like he didn't matter anymore, like he'd have to beg for that affection which once belonged to him only. Then again, he had it coming, right? After everything he'd done, the lives he'd taken, how could he expect you to keep calling him your baby? But God did he wished for once you'd look at him the way you used to and tell everyone that he was still something to you, that that special place in your heart was still reserved for him.
"For fuck's sake-" Jason grumbled as he walked into the Batcave after a went wrong mission and another argument with Bruce, heavily injured. Then he saw you, wishing he could jump into your arms like he used to for just a second, but he couldn't, wouldn't, he wasn't your Robin anymore.