OH and I have been dodgy for a while but I really feel it is time to separate - I am not well and his attitude is making me worse. I struggle to look after myself but he goes away for work for days and leaves me to cope with the dc which is bad for all of us. He then complains / rants / raves on his return if the house is untidy etc. I know it probably sounds mad but what really gets me is when he posts on fb about being a mug or people taking advantage of him when I know full well he means me. He doesn't seem to get that I cannot help being ill and thinks just because I am home all day I should do all the housework, look after dcs etc when it is a struggle to even get out of bed 
So - how on earth do I go about leaving? The logistics seem a nightmare. Should I find a place to rent, and if so how do pay the rent? What haven't I thought of that needs doing?