Seeking, I can relate to how you feel...you are not alone in this.
Your h is not the only one that is still crazy after all of these years...mine is still trying to live the life of a youngster and be all that he can be at the age of 59. I just sit back and laugh when something falls into my lap about him. No one knows him like I did and some day, it's gonna catch up w/him and he will crash and burn....will I be there w/a bucket of water? Nope....no longer my problem. He's still running from what ails him, just like your h and all of the mlcers that we are dealing w.
Seeking, the only advice I can offer up is to live your life to the fullest and know that you are a good person and a wonderful mother. You have so much to offer to the world and you will continue to grow by leaps and bounds.
Hang in there!
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.