We just don't like each other anymore, went out for lunch alone recently and I spent the entire time reading the menu, we didn't speak..... except for when he told me to shut up because I spoke too loud 
He made an absolute twat of me recently outside our house when we were going out, the cat had ran out and as it was pretty stormy I wanted to get it inside... only to have don't be so fucking stupid, you're making a fool of yourself screamed at me in front of the neighbours.
We don't sleep in the same bed (he sleeps on the floor)
He went out recently and as he can't handle his drink I put the chain on the door so I could see what state he was in, he 'pretended' to be ok, so I let him in resulting in around four hours of verbal abuse and him trying to drag me out of dds bedroom (where i'd gone to get away from him)
I have put up with all of this for years, the belittling, the humiliation. He has dragged me down so much and made me so low. I then get shouted at for staring into space, I get shouted at for chewing my hair which I try to hide behind so he can't see me and how disgusting i've become. The house is a mess.... I get shouted at for that which makes me feel worse.
Tonight however he has gone too far. I had put on a pair of his shorts earlier as I chucked mine in the wash so was going to have a shower, he put them on after his bath and came stomping down the stairs screaming 'these fucking stink, why do they fucking stink'
I told them they stink because I stink, it's probably true. I probably do stink.
I want out, I can't take anymore i'm fed up of having no confidence and walking with my eyes fixed to the floor and of not wanting to go outside. I hate it, I hate me. There is no affection there. I don't love him, we make each other miserable
What the fuck do I do though ?? How do I get out of this ?