Corri, this is just a guess but I would imagine that the reason that your husband's comment hurt you was that he was saying, "Nothing made me hang in there." I think that all women want to hear, YOU made me hang in there--because I love you to the ends of the earth, dear!!
Also, this may not apply to you, but I would be a little resentful of being the one who changed, ya know?!? Because, by definition the changee is the one who must have been 'wrong'. In real life, there is no right and wrong. Well, that's not true. There is right and wrong, but it is usually both parties that are right and wrong.
He was brutally honest and I can totally see how it would sting a bit. Congrats to you for working it out in your head and turning it into a positive.