Unsure how to proceed

[Rose888]

Absolutely don't initiate R talks. There's no point at this point.

I strongly second Steve's comments on differentiation.

You said your husband had no other complaints, but if you dive deep, I bet you can identify exchanges you frequently have that end in bad feelings or frustration. I would pick one or two of those and work on doing a 180 on your part of those exchanges. There might be other things that you can think to change too.

Are you employed? If you're a SAHM with an H who gives every indication of having an affair, I would spend some time thinking about how you can support yourself in the future. Don't take steps without consulting a lawyer, but start researching options.