Where do I start

My partner is a gambling addict I work from 6am till 5pm I come home to him sleeping on the sofa my heating on full and no cleaning done we have been together for 6 years and I have a autistic son. I come home after work do all the cleaning and washing I don’t go to bed till 12pm maybe 1am and then up for work by 5am ... today I came home to him jerking off to porn !!! I don’t want to be around him I don’t like him like I use to I want to leave him but he always threatens me with social because I use to suffer with postnatal depression I can’t deal with not having money for food not having enough money for my bills I feel like I can’t cope anymore! Ladies I need someone to talk to because I’m at breaking point.