It is hard to see what you know your H will be missing if he continues on this path. I choose to see how blessed I am that my kids and I are close and that they choose to come to me and work out their stuff. His loss.
Don't focus on him. Don't feel bad for him. Keep that light on you. Leave him alone like your FIL said. Now you work on you. Your H has a ton of work to do and that is up to him if he does it.
kat
Me-53(and learning!) S24, S21, D18, D17 Just keep swimming, Just keep swimming. Dory