You are going thru sooooooo much. DO NOT allow that "fool" feeling to fester too much. I used to refer to myself with that term too! UUUUUUGGGGGGGGGGHHHHHHHHHH is right but take a real deep breath ... and imagine yourself throwing a couple things at him just kidding of course..... LMAO
You are no fool.. you just love him. HUGE difference!!!!!!!!
But do not let that LOVE cloud you OVER either..

.....do not take your claws out SWEETIE but do lovingly detach a little more and protect yourself by loving yourself more and really working on you. I know it sounds corny but it really does work! And remember it takes time and you need to allow yourself that time. And whoever put in your thread that OW is like an addiction is right,,, and affair is hard for them to let go even when it is toxic. And then when they let go they actually grieve it too.
TAKE CARE OF YOURSELF HONEY PLEASE AND I WILL CHECK ON YOU WHEN I CAN~
God bless...