r/survivinginfidelity might help you.
Also, a great book: "https://www.amazon.com/Leave-Cheater-Gain-Life-audiobook/dp/B075KG561V/ref=sr_1_1?crid=17Y0ISEPSM92&keywords=cheater+book&qid=1670025348&sprefix=cheater+book%2Caps%2C90&sr=8-1"
^The above author also has a website: https://www.chumplady.com
Good luck.