I think what Ali said is really good. "Hope you're OK" is a typical WAS saying. I got it all the time too, or other variations like "hope you are well","be sure you take care of yourself" etc., but "how are you" is definitely not something your H wants to hear a real answer to. Honestly I don't even hear "how are you" now.
Maybe your H does think he gave you the details already. No way to know for sure, but I know that mine seemed to be (and sometimes still seems to be) not exactly in tune with reality. He would get timelines wrong, ask me about things that happened months before as if they just happened, etc. So regardless of why he didn't reach out when he'd said he would, and I think that we will all agree that this was his responsibility, you are the mature, rational one and have to deal with it now.
Really I think Ali hit the nail on the head. Just write back truthfully but politely. If you want to couch it in a joke, that's fine too, but I don't see the need. I think you need to be as clear as possible so that he realizes you don't have what you need to make a decision. Obviously I'd steer clear of accusations or guilt-inducing statements like "you said you'd call but you never did", and would say something like "I haven't been able to look at the options because I don't have any of the details; can you suggest a good time to meet up or talk to discuss? Hope you are doing well." I threw in that "hope you are doing well" because one of the things Jody always said to me was to match H's tone.
As Ali asked though, what is the best next step for you? Can you help things to move in that direction?
ITH
Me:34 H:36 M:5 years T: 8 years Bomb: 07/17/08 I want to be separated for 6 months--I don't know what I want the outcome to be S 07/28/08-11/08/08 Living together ~7 months D Possibly busted?!?!!!