Boyfriend going out with friends

I am a pregnant stay at home mom. Normally I never mind when he goes out or how late , but lately he’s been going out a lot more, as well as working a lot more. Like I said I usually never mind , but lately I’ve been hurting really bad (38 weeks pregnant) and we have a 3 year old as well, so I could really use the help. He goes out 2-3 times a week now. He will go to work at 7am, get off at 4pm and go straight to his friends house so I won’t see him until anywhere from 7am to 11pm-1am meaning I’ve had the kid literally all day by myself so I am exhausted. I try to talk to him about it, but it’s like he dosent really care, and if he does happen to stay home one time instead of go out he’s mad all night. Am I being selfish for asking him to stay home more and help?