I need some sisterhood support

Hello sisterhood, i need some kind words and strength.
My partner and i have been together for almost 8 years, we have 1 child together.
Before falling pregnant we had never lived together properly. That was 6 years ago. I never realised how selfish and childish he was until we moved in together.
I suffered, still do, post natal depression and anxiety and he offered no support.
He's main concern was me losing my sex drive.
I have tried leaving before but through circumstances and guilt i stayed with him, things have not changed, and i know they won't.
I am full of resentment and hurt. I constantly feel like a piece of furniture, here for convenience and for him to show he is in a relationship (he had never been in a proper one until me).
I know my heart hasn't been in this for a long time, but i am feeling stuck. I committed myself to being a stay at home mum and had to enter a debt agreement after having our child as he wouldn't help pay for my loan and i couldn't afford to on my own. Everything is in his name.
My family love him, and made me feel horrible when i left him the first time. Our friends are all mutual, i have noone to turn to for proper advice.
I know things in life aren't meant to be easy, but i know life is only lived once, and i feel like i stopped living my life just to keep him happy.
I am terrible at confrontation, i just don't know what to do anymore.
Please help ladies, much love.