To me, it always feels like I'm making excuses to be on Takumi's side. BUT... I think he acts as if Reira is much weaker than Hachi and needs him more. I obviously don't think that's right, Reira might be weaker, but it's because she doesn't want to be stronger. She wants to always have people around her that show that they care for her and do things for her. Hachi, on the other hand, has grown immensely since the beginning of the manga. She still needs Takumi, even though she doesn't show it. And Takumi doesn't seem to see that. Since he's a childhood friend of Reira, he has probably been there for her every time she 'needed' him, so I guess he doesn't know what to do or who will be with her now. He should just leave her alone to learn that being alone is not necessarily a bad thing. And it makes people think and grow (things she doesn't normally do, apparently).
And even though I'm in favor of HachixTakumi, I was really happy that her and Nobu started talking again. They had such a nice friendship before (and during) their relationship, I feel like they need each other at least as friends. I was so happy to see that hug at the end.