Agreed. This was WAY beyond "I accidentally developed feelings for this other person and I'm torn as to what to do".
This was complete and utter disrespect and lack of ANY consideration for you AT ALL.
I'd be worried too about taking such a guy back. I am having a hard time imagining what he would have to do to convince me he had changed. Certainly a year of regular therapy would be a start - I mean, there's some serious issues with a guy who would carry on his affair as openly and inconsiderately as he did.
I mean - most WASs act like inconsiderate idiots. But the way your H carried on in front of you, disregarding completely how rude that was - that speaks to a deep character flaw.
