Take a sick day. You are going through much more now than you probably will be later. You need it. Do it. It's Friday!!! Stay home and be good to yourself.
That's my vote. Oh, and excellent letter and "posture". Assuming you don't ask questions that you aren't prepared to hear the answer to, you asked because you need the answers now.
When my kids back me into a corner and insist on a "yes" or "no" though, I always take the safest route, with the least amount of possible damage.
I hate to do this. But. What if. What if he is feeling residual withdrawl from past lifestyle-- that is-- non commitment to fidelity. What if he honestly isn't sure he can maintain something he never has (he really needs IC!) and wants to do this (new relationship in new home with you and kids) right and honest and needs more time?
I just want you to be prepared-- on all levels, for that which you cannot control. It's obvious to all of us that you are right-- but what if he needs more counseling before he can answer those question with self awareness instead of from fear? I mean, what if he "burns bridges" he doesn't mean to because he's still screwed up inside? UGH. I wish you could go see Fireproof and try that 40 day challenge. It's a shorter commitment, like a baby step, that could buy you both more time.
