I'm sorry it's been rough for you, but I'm glad you're looking forward to some space and time for yourself.
We haven't talked to my sons about the marital issues although they've heard stuff along the way. My youngest constantly tells my wife and I that we're awesome parents and I know that he's trying to say "make it work" but it's also very sad that he feels like he needs to help fix things. Anyway, I'm just saying that I know how hard it can be when children are involved.
I'm glad you did a good job validating; I'm still struggling with that. I think teaching your son about you hard-learned lessons would be a good thing. I wish I'd known that stuff before getting married.