Your W was 'gaslighting' you, making you think you were crazy to think such awful things about her. I totally agree with Puppy that Intel is necessary when you are constantly hearing lies. After that, pointless, UNLESS it pertains to your kids well being.
Funny these spouses say OP has nothing to do with them being so unhappy in their marriage. H shot this to me ALL summer long when he was involved with OW. When he broke it off, she became the one and only reason our marriage has failed. Ironic.
I agree, I don't think you should proceed with filing at this point. Does your W know you are dating? Do you feel emotionally ready to be dating while you are married? Do you boys know you are seeing someone?