“Queenie is just his end all and be all, and if there is any chance to get back to her… But when you first see him in at the beginning of this film, it’s almost like that fire has burned out. He’s just so tired and at a point where he’s like, ‘All right, I guess I just have to forget about this. That was a chapter in my life and it’s over.’ But when Lally comes in, there’s maybe an opportunity for him to get her back, then the flame is rekindled and he jumps back on board again. And I think that’s beautiful. He’s been through hell for this woman, but still there’s a little glimmer of hope. And you know, J.K. Rowling says that the most powerful magic in the whole wizarding world is love. And I tend to believe that’s right. I mean it just conquers all…and all reason. Everything in the world is telling him not to jump back onto the carousel. But he does because of Queenie.”
Source: Bearpost