When is enough REALLY enough?

Hi Ladies.. I’m having a bit of r/ship troubles atm.. we’ve been together for 2 1/2 years, have one child together and another one on the way (I’m currently 13 weeks and hormonal AF!) but lately I have been feeling like he doesn’t appreciate me or treat me like ‘a partner’. When we argue he generally twists it back to me and somehow make it my fault or he acts as if he’s always right. I feel like he doesn’t support me as his partner or the mother of his child. He can sometimes try to be controlling towards me and what I can/can’t do. He has a marijuana addiction.. and I’ve only recently come to terms with it and actually called it an addiction. I feel as though he has a better relationship with his bong than he does me. He can be a good dad.. but I feel like this addiction consumes him and makes him lazy. I will cook, clean, wash and look after our child and some days he will do absolutely nothing. His father and brother live here also.. which I felt pressured into saying yes to. I’m getting to the point now where I feel my life would be much more easier on my own with my children. I am an I dependant person and will manage on my own, I know i will but when is enough enough? When will I know when to ask him to leave? (It’s my house)

Thanks for reading.. any advice is really appreciated xx