For the ship/song ask, could you do Blupjeans with "Something I Need" by OneRepublic? (tbh if I could draw I'd do a whole lyricstuck with this ship+song combo)
Barry still wakes up ready to be alone for a long time, after the world is saved. He opens his eyes and immediately reaches out to Lup, and usually wakes her from her trance when he does, but he has to know. They don’t rightly need to sleep anymore, but they do. They don’t need to eat, either, but Taako isn’t about to let them skip ‘family’ dinner nights just because they’re undead.
He’ll curl his arm around her middle and scoot closer, and she’ll pat his hand with a yawn. “What’s up, Barold?” She’ll reach back and pull his other arm over her waist and settle in, dozing.
“Nothing.” He lies, and then. “I just. I love you, Lup. I love you. I missed you so much.”
Lup nods, and turns to face him, her own arms draping over his shoulders. “I missed you too, Barry. If I could have gotten here faster, I would have.” She smiles at him and he can’t help but smile back, because she has that way of somehow easing his worries without doing anything more special than loving him.
He never wanted more than this; hell, he wanted less. He was ready to be a researcher, and maybe, just maybe, have a shot at the gorgeous elf on his team. The fact that she wanted to be with him was enough, even colored by the Hunger’s appearance in the plains and their mad-dash between them to try and stop it. Working for the Raven Queen wasn’t what he’d anticipated, but he was working with Lup, and living with Lup, and she loved him, so it was good.
She loved him, and Taako liked him, and he had his friends– his family back, now, and it was more than he had ever hoped for. And he had Lup, and she had him, and they were happy.
It was good. He still dreamed about the Hunger, about the times he lost, the times he had to die or watch one of them die. About the endless nights, formless and alone, only existing because he needed to fix what they’d done, and bring her back, because he remembered her and remembered his love for her. It wasn’t something that would stop right away; Lucretia had said she still had dreams about watching Magnus forget everyone. Everything.
Now, they’re safe, and they can try to rebuild; Taako is still cold towards Lucretia and Barry still has trouble remembering that Lup will come back, always, but they can rebuild. They saved the plains, all of them, they can work on talking to each other. They can work it out in time. He has Lup, and he knows that anywhere she goes now, he can follow.