He said that the reason he could not admit to wanting to be single was that he felt like he had failed me and the kids.
...and inside of the cheater's mindset, after he says this pitiful drivel to you with an air of sorrow, he in the meantime is expecting you to feel sorry for him now that he has been so "honest" and you will take him back for another try, rugsweeping all the way & he'll either continue to cake-eat or repeat this scenario.
Best wishes, best you found out now before you had a kiddlet between the two of you. There are still good men out there. We know this because we see them on these forums. They call themselves Menz