I like the action you are taking. Keep her out of your life. You may not be separated legally, but he moving out if basically separation.
Try not to read into the sex life with OM thing. It's a bunch of BS.
Now that you have the place to yourself, I'd recommend enjoying being able to do whatever you want all the time. It's my biggest regret from last year. You can really go live it up and have a lot of fun.
In the meantime you can continue to consider divorce but I don't think it is something you should pull the trigger on right away unless you are 100% sure that you won't tolerate and an affair and wait around for her to wake up. Take some time to be sure IMO.
Work on your detachment. I'd read those links in Cadet's welcome post throughout the day and keep asking questions.
H 34 W 29 BD 3/12/18 Divorce Busted Spring 19
It is not things that bother us, but the stories we tell ourselves about things.