GM, I agree w/Bea. He is projecting on to you how he feels, but most importantly, he's shifting the responsibility on to you versus looking at himself in the mirror and accepting that he is human and is not perfect.
He is very much in the "young adult" mode, i.e., selfish, lazy and thinks he's entitled to everything.
I hope that he'll accept one the offers so that you can move forward and make some decisions before the children return to school.
Take care of yourself.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.