I didn't. He'd want to come with me.

[Which wasn't about to happen, just as Rei wasn't going to go with him either, if he had any say in it. And injured or not he was still an angel and he could evade her if he needed to.]

There will always be an opportunity. I can't defeat her; if she decides to kill me, then she will, with or without the souls and whether or not I'm fully recovered. None of that makes any difference. It's a calculated risk and a strategic decision.

[He's being realistic, not suicidal, as far as he's concerned. There's just a high risk of dying involved.]

Your presence will not help.