H has always been difficult, angry and shouty... for years I struggled to smooth things over and address my 'shortcomings', predict his bad moods and mitigate accordingly, and try to keep quiet for the sake of the DCs (now grown). Everything revolved around him, the family focus was on keeping him happy. Well, maybe not happy but I (and the DCs to some extent) was always on high alert as he could tip into unhappiness in a flash if he wasn't the centre of attention.
I've got some flabbergasting memories of birthdays, holidays, graduations spoiled by his irrational anger, scary-on-purpose driving, black moods ruining events. I read Lundy Bancroft's 'Why does he do that?' and realised that he was described in that book. Not physically abusive, but totally self centered, and it suited him perfectly to be that way.
Now we are getting divorced, been living separately for a few months. I'm fine. It was his idea to divorce as I think he had a crush on another woman. But mainly his reason for divorcing me is that I stopped having sex with him. He says I have not shown him any affection over recent years and it's driven him to despair. He says that I don't want to 'be a wife to him'. 
Trouble is, I do feel guilty, like I didn't try hard enough. We were so young when we got together and I never had another boyfriend and I think we clung on to each other out of fear of the unknown. So it's true that I may not have ever really felt like I'd had to win his affection. And I never really felt butterflies for him or TBH never really physically attracted to him although I thought we were a good match intellectually (we're not anymore but that's another story). So he wants a relationship with lots of sex and affection/adoration and he's not going to get it from me. He is right to go for what will make him happy and I'm lucky to be getting out.
But...I'm feeling guilty because if he changed (accepted me working, respected my interests, didn't get mad at me all the time, etc) I wouldn't mind staying married. It's such a pain to split assets and break up what little family we have.
Just a rant. We are doing the right thing. Right?? He won't change...please remind me!!