Advice please 🙏🏼

Hey, just wanting to get this of my chest as I can’t speak to anybody in rl.. me and my partner have been together 6 years and we have a LB who’s 4,, my partner is constantly on his PS4 every night even if I ask if we can spend time together and watch a film when baby goes to bed.. which he never does.. anyways it’s got to the point we’re I’m just sooo unhappy and I’m so lonely (told my partner several times and he just doesn’t respond or says I’m mentally unstable) so I done the lowest thing and I started to message a guy I knew from years ago.. my partner has found out (fyi I’m so disgusted with myself) and tonight he’s dragged me by my feet from one end of my house to the other calling me a worthless whore/bitch etc, I mean I totally understand and I deserve it.. I just don’t know how to leave.. he’s bruised all under my arms and they are just so sore to touch..

I guess what I’m wanting to ask is.. is this the start of the abuse? does it get worse/better? Did I really deserve having my face scrubbed into my carpet ? I’m just so shocked he’s went so far 🥺🥺