Sounds like a cop-out to me. Obviously your H is battling depression but this phrase...

I would live in an apt so he could have pool in his backyard. You are going to look back and be happy. You're going to find mr right, me on the other hand I am just going to work to make sure you two have a good life.

sounds like he is still with or wants to be with OW...it's an escape path for H to lessen the guilt on himself by "providing" for you and your S...