[ He recognizes the words. After all, he saw her determination to kill her sister. If Shirou hadn't done the impossible and chosen to protect her instead, Rin would have broken herself doing it. ]

No.

There's no need to speak of "responsibility" here, is there? I'm merely doing a thing I want, which is helping you. You're not responsible for anything about it.

We can stop for now. I'll find a way to transfer my energy to you that doesn't ask you to hurt your heart or share your body. Who knows? There may be something.