Father of Unborn Being Very Rude

Im 36 weeks. We have been together over 2 years. We live together. He drinks heavily and is known to be very insensitive anyway. I chauffeur him around, I cook, I clean, I try to be kind. My 2 daughters from my 1st marriage came home for the week (ex and I split custody) and I allowed them to eat dinner upstairs in their room bc my boyfriend was napping downstairs. I thought I was being considerate. He woke up and immediately picked a fight with me. Said I don't follow the rules (whose rules?!?). I don't think its any of his business where MY kids eat anyway. From there he picked a huge fight, said he "Doesn't give a f*** about the baby." That its my baby and to "have fun with that". Then said he didn't want to be here. I can't tell if he is just looking for an excuse to leave me home and party tonight or if my kids presence irritates him (too bad). But I don't want him being very involved with my kids anyway because obviously his personality is unstable. I don't think its okay to be treated this way and Im disgusted he would talk that way about his innocent baby. I want him to leave.