I don't know your story or history, so it's difficult to respond, but offhand, I'd say that it's best not to respond until you have your head clear as to your doubts. Once you have been in NC with him for a while, you will know more what you want to do with all of this. Don't let him rush you.
Does he need you financially? If so, this is a big red flag.
If he has had more than one affair, my advice is to keep right on with what you're doing, and don't respond to him at all. He's just trying to play you.
At any rate, I would say that his words are fine, but so far they are only words, and actions speak louder than words. Even in a situation where a couple does get back together, the best way to do that is to go for 6 months with him out of the house, dating you, and taking every advantage to put action to his words. Only then will you know how sincere he is, and whether or not his actions for a serious R will last.
But like I said, if he's been given more than one chance already, I would go NC with him for good.
Walk a Mile In My Shoes
Married 14 yrs. Now Separated & in NC
2 grown DD's - his from previous M
4 grown kids (2DS, 2DD) mine from previous M