Fed up already

I dont know if what im doing is right anymore. My husband and i have been together for 7 yrs already and lately our fights have been getting more intense. He is always insulting me saying that a prostitute would be a better house wife than me, hes constantly making me feel bad about my body, calling me fat and telling me that if i keep eating i wont be able to fit.through the door.anymore. last night he told me how gross he thought my body was and thats why when ever we have sex he finishes as fast as he can. We have a 5yr old and he loves his dad to bits, and ive stayed w his dad all this time cuz when we have good days my son is so happy but i dont know how much more i can take, cuz 20 mins after hes said all of that to me he'll come up to me hug me and tell me how much he wants to have a baby grl that looks just like me. Ive lost count of how many times ive cried in the shower and how many.times ive cried myself.to slp. Im tired and i just want whats best for my son. I dont get why he doesnt just leave.if he says he hates me so much and calls me a bitch