By getting out of dodge.
Seriously, when are you going to stop torturing yourself? I know you love her, but sometimes love isn't enough. She seems to have alot of issues going on with her and combining those issues with your issues how much can one man take? I honestly, can not see how you are even able to still touch this woman after she has slept her way thru the whole state. She's nasty. Blaming her actions on her sickness was a cheap shot. No. You will never forget what she has done. You may forgive, but you won't forget. The only reason you are staying in this marriage is because you are still afraid. I hope you come to your senses soon. Good luck.