OP, please ask yourself, what is better, a situation where you’re isolated, ill and unable to access treatment, being physically beaten and emotionally tortured by your partner, or, being in shared housing, which might be scary for a bit but is something you’ll get used to very quickly? Would you not like other people to talk to, and by that I mean talk nicely to not be screamed at and threatened by?
You would have a room that you could lock, and nobody would be able to enter if you didn’t want them to. You would have help with your medical stuff. You would have someone to talk to, access to counselling, and a chance to integrate back into society with help and at your own pace.
At the moment you’re not on your own, or at least you won’t be when he gets back. You’ll be living with a man who beats the shit out of you, emotionally fucks you up so bad that you can’t tell up from down and who will prevent you from getting well. The reason you’d prefer to be beaten is because when he’s beating the shit out of you you’re not waiting, worrying and scared about when he’ll beat you again, am I right? I am right aren’t I? It’s almost like being put out of your misery. I want you to let that sink in, for you to realise how far from ok it is that your relief from mental torture is having the shit kicked out of you.
Do you have messages where he’s threatened to kill you, or when he said he didn’t beat you up he only hit you? If so then you’ve got proof, and even if you don’t your word will be plenty, because outsiders, especially ones who are trained in DV support will see right through you. You need to reach out though. Nobody is going to ride in on a white horse, I’m sorry.
Also, is the tenancy in your partner’s name? If your partner gives notice get yourself straight down the council. Tell them you’re living in this hell and they will have to help you by law. A trail of accessing DV support will help massively. If he gives notice then he’s probably doing you a favour, because if you don’t have property and the tenancy isn’t in your name then by law they have to help you.
Your best bet is a refuge though because there you’ll get help and support, and you’ll be less likely to end up back with him. You can and will reintegrate into society but only when he’s not in the picture. I’d bet good money that after a short shock, being around other safe, friendly people will be a blessing. Isolation is dangerous, even for perfectly healthy happy comfortable people it messes up their MH, in your situation it’s devastating, and it only gets worse the longer it goes on.
Please, please, stop giving yourself grief and allow yourself to let go of self-blame. This situation is in no way your fault but unfortunately it’s your responsibility to sort it out. Show him that you’re strong, that you’re stronger then him. He wants you weak because he’s too weak himself to cope with a strong woman. You can be a strong woman, but you need to find it in you to stand up, and let others help you stand.