I hope things get better.

Ugh. In that case, maybe figure out an informal break. Clean your own space, fix your own food, do your own thing. And leave him to do the same. I'm not saying don't even talk, but try to step back. Let him know what you're doing though.

>I am so exhausted, and my therapist has suggested we take a break if he continues to refuse to be present and work on our marriage.

Is that feasible? Like do either of you have either the funds to pay for another housing situation or have someone you could stay with? Because honestly it's good advice. It sounds like he's isolating himself while enjoying the advantages of you being there to take care of things. If he wants to be isolated, let him see what that's actually like.