To ask for some perspective? *TW: DA*

Who owns the house?
You can’t go back, he will get worse and hurt you.
You are already alone even when you are with him, he doesn’t love or respect you.

Definitely don’t go anywhere near him OP. Get rid of him ASAP.

He'll hit you again, only worse next time.

If you go back you will be telling him it is ok for him to hit you. Why would you do that?

Please don't go back OP, you'e done the hardest part and left so stick to your guns, the language is horrible, so he's adding physical abuse to financial and I'm assuming likely emotional as well. Figure out what you can afford by yourself. Can you get PIP or DLA and pay for someone to come in to help you if you find somewhere by yourself as I'm assuming your father's house is not ideal.
But whatever happens don't go back, I've awful visions of you becoming well and truly trapped as I suspect he may make sure you can't leave next time.

Any partner (or friend) that hurts you physically or mentally, does not care about you.

Why go back to someone who doesn't care?

So sorry, but absolutely well done for leaving

Now, he wants me to go back home.

Of course he does! He needs to have someone to control and slap. He's missing his favourite whipping boy.
Don't you dare contact him, you've done the hardest bit. Look around to see what services are available to help you start over.

Please do not go back to this abusive bully. Please value your own physical and mental safety.
Pp’s advise getting advice and support from Woman’s Aid or similar local services, do the Freedom Programme, and start to live your life unafraid.
You have already done the difficult thing of leaving him, please do not go back into his dangerous reach.

You said he is your carer, does he get benefits for that? It could be the reason why he is wanting you back.
Don't go back to him whatever you do. Its not normal to clip someone round the ear and it could be worse next time.
If I were you I would be reporting him to police for what he did.

No!! Please don't go back! He's not "being nice" as he still believes he was justified in raising his hands to you. He WILL therefore feel justified doing it again.

You did the hardest part already in leaving him.
Block him and get as much support for yourself as possible. Contact Women's Aid, do the freedom program, research domestic abuse statistics to drill home the risk.

Understand that you chose this man as a result of what you witnessed having a father abuse your mother and don't repeat the pattern.

You deserve better

You need some external support, urgently. Do you have a social worker? Is there a charity for your health condition, or a women's health group near you? Get googling and get some extra help, you must be completely drained by it all.

Do not go back to him. This is not normal behaviour, it is just the tip of the iceberg and I can guarantee it will get worse

OP your relationship is more like pet and owner than a married couple. You give a dog a tap with a newspaper for disobedience.

He loves the fact that you're so dependent on him, he gets off on it. He's manipulating you to go back but if you go back, the clip will turn into a slap and the slap will turn into a punch.

You could contact Scope for advice and a domestic abuse organisation.

I don't mean to sound flippant by the way... this makes me angry on your behalf OP. Especially if you are vulnerable due to your disability. What a vile man! I really hope you can find a solution to stay away from this abuser. Best of luck. 💐

Tell him you don't tolerate twats.

He clipped you around the ear 'to prove a point'? Well, he certainly did prove a point, but not the one he intended. The point he proved is that he is an abusive arsehole who doesn't deserve to be in a relationship.

You've done the hard part OP in leaving him. Please don't go back he isn't worthy to be your husband or flat mate and it isn't safe. Take care.

He's a nasty fucker and a waste of space.

I'd laugh in his face.

If he touches you again ring the Police

That word 'misbehaviour' is a HUGE red flag. My father used the same term to justify his violence towards my mother. Examples of her misbehaviour included things like buying us Christmas presents. If you go back, you will live in fear of the consequences of 'misbehaving' My advice: walk away.

Oh love, well done for leaving. His behaviour then was wrong; his behaviour now is still wrong even if he ‘seems nice’. You asked if

Do you have a Women’s Aid service near
you? It may be good to talk with them.

This isn’t normal, not all men are like this and the ‘nice’ behaviour is certainly
typical of a ‘ploy’ to get you to comply.

If you are disabled you are more vulnerable so it’s even more important that you don’t go back.

Stay strong

You've already left him. You've done the hardest part.
You've been strong so you know you can do it.
Perhaps think about what you would be going back to if you did return. There are far worse things than being alone, especially if, as you say, his controlling behaviour is escalating.
Soon you won't be allowed out on your own, even to see friends...

He’s even said that he won’t tolerate "disobedience or misbehaviour."

He’s clearly told you he sees you as someone whose behaviour he has a right to control. And has shown you he thinks he has a right to physically control you. Going back to him won’t help anything.