if you just walked out of the door it would be n act of stupidity. you have to assess your financial situation, entitledto.com, CAB, solicitor, internet research. get the facts. know where you are positioned legally, what you are entitled to.
make sure you have access to money. squirrel some away ( you should do this anyway) enough to give you a month to get benefits sorted, perhaps pay a rent deposit and get on your feet.
also - in the meantime - you need to build up your life.
so, he gets to go out one day a weekend - so do you - i dont give a flying rats arse if you get the bus to the cinema and watch alvin and the chipmunks - go. go to a friends, go to a relatives.
then look up a local college - do a class. one evening a week- again it matters not - i mean if you can make it work for you in terms of future career options great - however if not, then do japanese pottery or something - just get out of the house...the point of this is to make your own life, your own circle, your own intrest. to build your confidence, meet new people, gain new experiences, have a conversation with other adults, get some perspective on life.
remember, the only person that can make you happy...is you!
and ...i haven't got the childcare, dh would moan at having to look after the kids - its excuses and bollocks. IF you really want to do something, if you really want to achieve something - you abso- fucking - lutley make it happen come hell or high water.
i am doing an evening class at the moment, and i cant tell you how much i enoy it, the conversation, the use of my brain, meeting other people etc. its a tonic.