I don't even know where to begin with describing the problems in my relationship. I'll try.
Together nearly 9 years, one DD who is 3. Problems when she was born with my mental health (post partum psychosis) which he did not understand. Really horrible, nearly got placed into a mother and baby unit but I reacted well to medication and avoided that.
Unfortunately I got pregnant again through a slip up when I was still on medication for this (DD was 18 months then) which I terminated. He was onboard at the time but is very bitter with me about it, as I said I don't want a second child. He says I've ruined his life.
He sits on the sofa drinking watching football with me running ragged after DD, criticising everything I do. I'm shit at housework, crap mother, mentally ill (I'm still on anti depressants).
I'll be the first to say I'm not particularly maternal, but I love DD and we are very close, I tried to keep her active and stimulated during lockdown by going for walks, baking and playing outside. In lockdown partner went mad when me and DD were around disturbing his work meetings, but then everything else I did was a problem. If I bake it's making a mess, if we go outside it's too cold.
We had some filthy rows in lockdown which involved us both shouting a lot, once DD spilt some water on the new garden furniture and he F'ed and blinded so much that my neighbour who I am friends with asked if I needed a place to stay. Other neighbours have discreetly asked if I'm ok, they must hear things as we row a lot.
Our families don't get on due to an unfortunate row between our mothers about my daughter and my mental health. I made a few mistakes with DD when she was young, it was nothing major i don't think, once her bath was a little too hot, once I went for a walk without taking a drink for her. My mother in law who was there both times ended up ringing social services about me.
He hates my brother who is an ex addict and any arguments usually end with 'why don't you go and stay with your smackhead brother'.
I have fallen out of love and have told him so, we have been in separate rooms for almost a year. He wants me to move back in but I've gotten used to sleeping alone (we still have sex, but not regularly). We argue about this issue pretty much every week and he always says get out of my house if you aren't happy.
I can't and won't leave, my parents gave us a lot of money for the deposit and don't want him running off with it. Unfortunately it was a gift and not legally binding. He will never leave either.
I've mentioned counselling but he says it won't work.
We go through a constant circle of a terrible couple of days, rows, then saying we will try, neither of us trying, rinse and repeat.
I don't know what to do anymore, I feel sorry for DD.
I wish I could up and leave and rent somewhere but my parents would never speak to me again if their money was lost. Partner also said he would never pay child support if we split, and he'd get sole custody of DD as I'm 'addicted to prescription drugs' 
the anti depressants, which I'm not addicted too, I've been on them for 6 months and have just had a medical review with a doctor who has extended that for another 6.
We aren't married by the way.
Partner's sides of the coin would be that he didn't understand my mental health issues, I ruined the early baby days for him. He works very hard to provide for us and I should be better at looking after DD and keeping the house in order.
Is there any way I can mend any of this? 
If you made it through that post, thank you for reading.