Thank 6ou all for your kindness.
I just feel so overwhelmed at the moment. I have had flowers from DS and phone calls from both, expecting DD in the morning, so that was clearly a bit of self pity 
He has decided to start speaking to me now. I am not reciprocating. Usually, I am so pleased that the horrible atmosphere has gone, I go straight back to normal. Not this time. He has suggested looking at a new car for me. Not this time. I have worked out my own finances and have just enough to buy a cheap little runaround. I want nothing from him. It will be used to beat me over the head with in the future.
My first step is getting mobile. Unfortunately, I need him to drive me to look at cars 
When mobile, and feeling freer, I will consider more options. I do not want to live like this any longer.
Would it be wrong to talk to my children about it before telling him I want out? I don't want to put them in an awful position, but I need support. My friends are joint friends, and without doubt, they would support me, but I don' t want to take away his support.
Sod it. Will take it one step at a time.
I appreciate the thing about counselling. The thing is, I know what I should do, I just do not have the guts, energy or drive to make it happen. But I will, I will.
Thank you all, you have no idea how much this has helped to clarify things, and I really appreciate all of the messages of support and suggestions. Thank you 