Ok, back now! (Please, throw money, not knickers! 
Flora it doesn't really matter what he wants right now, you need to try and detach from worrying about him. Right now, you do what's best for you and the DCs. The mixed messages are designed to try and guilt-trip you into feeling sorry for him. Ask him to stop saying these things maybe, reduce all verbal contact to the minimum re the kids and any practicalities.
Rose how are you feeling now? You, too, need to detach from your FW. It's hard, really hard, and the way you are feeling sometimes at the moment is part of the process. When I finished things with FW (after around 7 months of back & forth, torturing myself with hope of changes that never really happened), I grieved. Sometimes it felt like I would never be happy again. You have a lot to go through before you can come out the other side of this. But you will.
Is there any access to counselling or any support from the university services? Or contact Women's Aid to ask if they can help. Use the resources around you.
Triggles - if you are who I think you are, haven't seen you on here for a while. How's things? Glad you are not through the looking glass any more, but sounds like things are still difficult. How are the DCs dealing with it all?
bounty do you know, that sounds similar to what my tipping point was - I was told I was 'not allowed' my mum to come up to our house while he was at work, to help me sort out and tidy up DS1's bedroom. And when I queried this, was shouted at, yelled at in my face, called names because I'd 'created' an argument before he went to work again (this was about 7am). Later that afternoon, I got the usual 'sorry about earlier, let's move on, do you want me to pick up something nice for dinner' text, that I'd had hundreds of times. But I had already left by that point. It was a horrible, horrible day, I felt like I was going to die from the stress. But I got through it. I did it.
Sorry, epic post!!!!! I'd also like to raise a
to my lovely ex-FIL (the one who died on NY eve) - today would have been his birthday. He was flawed in so many ways, but I never met a truer gentleman in my life, in all senses of the word, despite the fact he hated wearing a suit and tie. He was the kind of man that gave me hope for other men. And man, could he play a squeezebox! Anyway. Cheers S. 