Hope, I think there is time limit to validating something the S says, particularly if not made face to face like email/text.
I think delete the text as you'll keep going over it. You'll remember what he said. Next time you see him you could offer a validation if the right moment was there. Otherwise, it may be best to not mention it.
Not sure - I'm not a trained psychiatrist!!
Me - 36, W - 32 No kids T - 8 yr, M - 3 yr Discovery - 14 May 2019 S - 25 May 2019 & D bomb - 29 July 2019 D & House sale final - Feb 2020