Hi Sproket,

I would like to welcome you. I'm sorry to hear that things have worked out this way. It's frustrating and it feels hopeless when our SO has a difficult personality disorder. It's tough.
I understand you care for him and want to help him. It shows compassion. I would like to make you aware that it may worsen his symptoms. He may take offense if it's suggested that he's mentally ill, it is a part of his personality. If he's self aware and truly committed on working on himself he may get help.
You want a divorce and there's likely a reason why.
Are there any kids? Are you living together or in separate homes? How's your support network?