Thanks for your good wishes TFMADD.
Hatty yes absolutely I am expecting them to live with both of us. I need a bigger house because I need an extra bedroom for the au pair, that's all. DD will have bedrooms at both our houses. Tbh, because of my course, and because I find the family unit oppressive, he spends a lot of time on his own with dd anyway. I've let him take them off for bike rides etc, or to the cottage for the weekend because for a long time I haven't really wanted to be around him. The excuse has been to let me study, but often I've just been at home on my own feeling depressed and missing my children, because this is the price I have to pay to have time away from dh.
It's not satisfactory obviously and I feel like I want to reclaim my relationship with dd on my own terms. It hasn't broken down at all, but dh always wants to do everything in the nuclear family unit. He adores the girls. But this is one of the reasons things have gone wrong for us I think. When they came along we stopped doing things as a couple, I just felt he lost interest in me really, and became grown up and responsible to an excessive degree. I was used to having my own life and friends, but dh would only want to spend his time with us. He stopped spending time with his friends. He'd never go to the pub or off to play golf like many men do.
He thought I should be grateful for this, having a husband who wants to be at home all the time. Since I started my course, I get no time with dd on my own. If I suggest doing something together with them, he will suggest we all do it, unless it's shopping, which he doesn't think of as something worthwhile to do (unlike going for walks, bike rides etc). So I feel on the outside in my own family. He, on the other hand, gets them to himself loads, because I need to study, but it's never reciprocated. He gets to be the primary parent, which suits him because he is quite jealous.
If we separate, I will get time to myself with dd and I love that. I can be myself with them much more when he isn't around, because he used to be so critical I can't relax when he's around and I'm always feeling like I'm doing something wrong. (History is that for years he would be pissed off about something, often something small, but would insist there was nothing wrong. I would know there was, and beg him to tell me, which he would, eventually, after days of sullen behaviour and my begging to know what I'd done). Now he's less critical and nicer to me but I can't let go of the feelings of insecurity and inadequacy.
If you got a puppy and beat it for the first two years (hypothetically speaking, obviously) and never did again, it wouldn't get over it. It would still cringe five years later if you raised your hand. I feel our marriage is like this, the damage can't be undone.
Sorry for such a rant, I suppose I'm grappling with all this, trying to reassure myself I'm doing the right thing.
And I do feel really sorry for dh though I know he's made his bed in so many ways. It's been the same with work, after dc came along he resented the time he spent at work and the fact that he's never been positive towards it is a factor in things going tit-sup since the recession hit. He was happy to chug along when the work was abundant and got too complacent.
He's always been a half-empty cup sort of person and I was the opposite. He's drained the life out of me and I've become such a sad person. I know it can change, but only if I escape, but there's a huge price to pay with the guilt :(
We're still under the same roof and it's difficult. I want to spend as much time as I can with dc, so I'm quite reclusive and not seeing my friends. I feel like I'm hibernating and waiting for life to start.
Thanks everyone who has read my thread and taken the time to comment and give advice and support.