...I have a work dinner I was invited to and I asked him to go on Sat. He said he would. Should I have not asked him? I don't want to seem completely cut off...
You need to always do your best. You did your best with what you know. He said yes! That is positive. (Do not second guess yourself.)
Think of this as a "FIRST DATE". Be attractive and fun. You need to project that you will be fine with or without him, but would prefer to be with him (From this point forward).
Proper grooming is key. I know money is an issue for you, but divorce can be very expensive. New hair style, change in makeup, new clothing, nice perfume. Be creative. Friends should be able to help.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712