[...]

Reunions have... generally not gone well for me, as you may recall. [a beat, and then quickly—] Not that I expect it to go poorly with Nahida.

[she is highly unlikely to try and kill him, which will put this above most reunions he has.]

I am happy for the chance to speak with her again, and there is much I wish to say... but I suppose, even knowing Nahida has a kind heart and that it's ungracious of me to think this—I am uncertain. All I have been able to do is watch them from this side, but the same isn't true of them.

[it's an awkward phrasing, of someone who has reached this point of confiding in rin but isn't quite ready to vocalize exactly what he's feeling.]