@FantasticButtocks I would definitely have distanced myself from any friend that behaved like he did a long time ago!
I think the reason it's helped me to reframe as a friend is because I do enjoy spending time with him when he is making an effort and in a good mood. This is pretty much most of the time now he is trying to be a better person (was very rare previously!). And as mentioned before I do value having fun as a family. So feeling that feeling was muddling me up because I thought that should be enough for me and maybe that was all i could expect anyway. But realising that I experience the same with my friends and that doesn't mean I would marry them, has kind of released me from the obligation to settle for that. Not sure if that makes any sense!
And the brief respite from the tension is such a relief it drowns out your little voice saying 'I want more/better than this from a husband. You then start second guessing yourself and get sucked back in to thinking the calm might last. But I think the consensus is it won't.
I hadn't thought about it like that, it is very likely partly due to the break from the tension that I'm unwilling to listen to anything else. Any sign of the tension coming back completely freezes me now.
Last night out of the blue he asked me if I had anything I wanted to tell him, negative or positive, and he had a very slight edge to his voice and I completely froze and panicked and went back into survival mode. Which I feel bad about now as he was probably just wondering how things were from my perspective at the moment after a pleasant few days, and hoping I had some nice to say, and I was unable to say anything that might rock the boat 
@wrigglewriggles thank you for your message, you're right I am scared to make the call. Partly because of how he'll be, but actually increasingly because I can't bare the level of hurt I'll be causing him, I just keep thinking that in the space of about 4 months his whole world has basically fallen apart, out of the blue from his perspective, and I'm just really so sad for him. When he's sad I just want to make it better for him

You do realise this applies to pretty much every small piece of autonomy you try to snatch for yourself? He makes it so difficult - therapy, bench, a night out with friends, work, and on and on - that it's not worth the hassle. He's ground you down and down so you don't even know how to include your own wishes on a list of pros and cons for how you want to live your life
Yes!!! That's so insightful, so true yet it hadn't occurred to me before. Things like seeing friends, having them visit etc, especially when our daughter was younger, just wasn't worth the hassle and so I became quite a flaky friend for a while as a result. I do constantly drop or rearrange my proposed plans if he shows the slightest sign of being put out by them - half the time now probably it's more me anticipating his reaction rather than him doing much wrong, but it's hard to undo that habit after a while.
I'm so gutted for you OP, you have a voice and it deserves to be heard -- firstly and most importantly, by yourself.
I think this might be part of the problem, @helplesshopeless? Your voice is drowned out so much by all the white noise generated by Derek's demands and feelings, you don't even know what you feel or want any more.
I suppose to take it one step further as well, my own well-being is measured and determined by his feelings, to the extent that I am struggling to do something that upsets him because of the resulting impact on me. So in addition to not knowing that I want independently, even if I do quietly know it, I can't act on it because of the impact of upsetting him. Which I suppose is partly a normal reaction to the idea of having to hurt another person, but also partly due to the whole issue around putting his feelings first and ahead of mine.
I think the OP's husband is trying to learn about himself and change his behaviour .I'm doubtful if he will be able to alter the fundamentals of what he wants and how he wishes his wife to be .I also think it's come too late and the gulf is too big to be bridged . And that there's little point in prolonging the struggle.
He is trying, he really is. He has his own difficulties but is otherwise a normal person who is really trying to be better. But yes, it is too late for me I think (and I'm trying to remember @Alcemeg's crumbs analogy!).
Hand on heart, not just me but (as far as I can see) all the other PPs, however tentative we'd normally be, can see beyond any shadow of a doubt (CAMPFIRE CHUMS, PLEASE CORRECT ME IF I AM EXAGGERATING HERE) that your quality of life would improve tremendously without him. But you will only understand this if you somehow manage to get out and away from his controlling influence.
Gah, yes, I know it would be, I really can see that now... just how do I do it?!
So we can support, advise and encourage her as much as possible but we are all leading our lives well away from her. Only helplesshopeless can make the call, only she knows the practical in’s and out’s of her life. She is going through a process and l feel she is still a bit of a way from reaching a point of no return.
I do think I'm there, not at a point of no return, but at a point where I think I know what I want. But I'm still frozen, honestly the thought of saying anything is making me feel hugely panicked and I'm in the verge of tears just writing this
I have no idea how people manage to make these huge decisions, especially when it's only wanted by one person in the couple.
Ending her therapy because of his stated belief that it wasn't helping her, means there is a long way to go.
I have a feeling that this is one of those things that I'll look back on in a few years and be appalled with...at the moment, I can see the outsiders perspective of it not being great, but right now it doesn't feel like a huge deal. But I guess that's part of being wrapped up in this pattern of behaviour!
I'd be nervous to bring up with my husband that I'd like to start again
Do you have to mention it?
Have you told him you're discussing it with a load of Internet randoms? He has no idea what evil influences you are subject to, it won't hurt him not to know about that either.
It's just the practical side of actually having it - we both work from home and there's no way of guaranteeing he wouldn't overhear.
Another brain dump from me!! Sorry about that. Always in a bit of a rush with my responses when I'm not working as I don't have any time to myself
anyway, thank you all so much for your support. You're all amazing 