should I leave him?

Been with my partner for 4 years now and have a 1 year old together, we've not been getting along lately, arguing all the time, he's so negative, every time he comes in from work he's just moaning about something, he ignores me when I'm talking about something and if I ask if he's listening he says ' yes I'm just not interested'. We've had sex once in the last 1 year, he never kisses or cuddles me anymore. I feel so unloved, he never compliments me or makes me feel good. I pay for everything all rent, all our babies stuff, I pay for all the holidays, etc. I'm so lonely and unhappy. I care for him but we aren't good together, he seems to think everything is fine. And when I tell him I'm unhappy he says it's my fault and that he's happy. When I say I don't want to be with him anymore, he says ' don't say that we are 'baby's' mum and dad. I'm so lost 😓😓😓