*雛*にとりといると幸せ。一緒にいるだけですっごく幸せ。ずっと一緒にいたいけど 私といることでにとりに不幸が訪れるなら私は・・・影から貴方を守るの。 にとりのためならなんだってできるわ。だから・・・だからさようならにとり。

*にとり* 雛といると幸せ。一緒にいるだけですっごく幸せ。ずっと一緒にいるんだ。 なのになんで離れていってしまうの？私のこと嫌いになったの？ずっと一緒にいてくれるって 思ってたのに・・・いかないで。いかないで雛。待って！いかないで！

To those who translate this, thank you.

Took a crack (please correct me if I've made any mistakes).

Hina: I was happy with you, Nitori. I was so happy for just being together. But if you keep visiting me, Nitori, you will suffer from the misfortune that I carry... I want to protect you from the shadows. I will suffer anything for you, Nitori. So... goodbye Nitori.
Nitori: I was happy with you, Hina. I was so happy for just being together. We were always together. So why are you going away? Do you hate me? I don't care what happens so long as we're together... Don't leave me Hina. Wait! Don't leave me!

I fixed it up a little.

Hina: You've made me happy, Nitori. Just being with you has made me so happy. I want to be with you forever, but if being with you were to bring you misfortune, I would just...　I will watch over you from the shadows. If it's for you, Nitori, I will do anything. And so that's why... that's why this is goodbye, Nitori.

Nitori: You've made me happy, Hina. Just being with you has made me so happy. We should be together forever. But then, why do we have to be apart from each other?　Do you not love me, anymore? I thought you would stay with me forever. Don't leave me. Don't leave me, Hina. Wait! Don't leave me!

Karonath said:

I fixed it up a little.

Fate can be a cruel mistress. And through that cruelty is where she's at her most beautiful