You handled that BEAUTIFULLY. "Expect nothing; GIVE nothing." Let him talk, listen and VALIDATE.
Your husband is still trying to make this all about HIM. Even the way he frames his apologies ("I hate that I did this to you"), is very self-centered, and typical of someone who is wayward and confused.
I'd suggest, in addition to your "one day at a time" thing, you start to add in a "I'm not sure what I want right now," or something similar. He needs to know that you're not just sitting there waiting for him, that the longer he waits, the more he's going to lose you.
