Barely over a week and I'm so confused

Sadly I'm new here and still not super familiar with all the acronyms. Together 23 years, married almost 18, 2 kids.

DDay was last Saturday.

If you had asked me a month ago my thoughts on cheating I would have confidently said it would be an immediate deal breaker. Now that I am faced with the reality of it am shocked and ashamed at how much I am considering R.

It's only been a week but WH is doing "all the right things." Full responsibility, remorse, not blaming me at all, full phone access. He has set up, without complaint, 24 hour video calls so I can check in and see what he's doing any time he's not with me. He's been so caring and attentive. He's being the man I have wanted him to be for years. It pisses me off to no end but I've been wanting this so deeply that it also feels amazing.

I'm scared for the future because I know this isn't sustainable. How long until he goes back to how things were? When he remembers he doesn't actually want to be with me that much? What if I realize his love isn't enough anymore and the damage he did is too big to overcome?

I marked this as advice wanted but I don't really know what I'm looking for. I'm so lost and confused