I take 4-5 showers a day trying to get my skin to stop crawling
What's the best way to get past all this?
Time. I've had the same, including nightmares. Two months after I confirmed OM, I can say that it doesn't wake me up at night anymore.
Also, if she could move out, it would help you. It seems a reasonable boundary: "If you want to have an A with OM, you can't be living here at my expenses." It stops you from thinking about it and it stops it from happening under your roof. It also confronts her to her decisions.
M39 D6 D3 (at S) S 2014-09 D 2016-09
"You can't start a fire sitting around, crying over a broken heart" - Bruce Springsteen.