Husband cheated, left, trying DB 3

[Dtrmned]

Kech,
I'm not going to lie. This [censored].
The only way for you to get some breathing room is to detach and not dwell on everything.
R2C said a couple of posts ago about "The hard path is the easy path".
The easy road is to allow him to dominate the space in your head all the time.
The hard path is to detach, work on yourself, make yourself the spouse only a fool would leave and then if he comes back great, if not, you and your D will move on to the next chapter. I know this isn't what you want to hear, we all are here to save our MR. One of the first things I was told and have read that if you don't detach, you have an almost zero chance of saving your MR. You have to decide if you take the easy way or the hard way.
Either way you will move forward.