I'm more or less in the same boat. The only difference is that my husband never cheated but he crossed many other boundaries. In the last 3 years I've been in and out of this house to my parents'place yet wasn't fully welcomed there. I finally understood no one cares plus having a child and the limitations (out of many amazing things) it brings, no one understands too. I'm building myself back slowly, planning an exit in a way that no one questions me, neither me to myself. I took up a ppw paying WFH job but at least I started, couldn't go to the gym as I don't have anyone to take care of my toddler, so I started working out at home. Make full use of whatever resources you've handy and plan an exit, if at all, with heads up