Pregnant yet no support from partner? Long details but please help!?

I'm 36 weeks pregnant. My boyfriend goes out every weekend (sometimes more often) and I've always just sat back and let him. However now that I'm approaching my due date I want him to stay with me in case I go into labour. We were supposed to go to antenatal class on Saturday but he wanted to go out so we didn't go- I said he had his priorities all wrong and he said I was selfish miserable and need to make more of an effort with his friends. I've turned quite reclusive since being pregnant as I'm scared of meeting people. Plus my point is we've been together 2 years and he hasnt met my dad so why should I go outwith his mates and watch them get drunk? I do love him but he doesn't seem to support me and seems to have his priorities all wrong. I'm petrified of going into labour as I know he'll be out and so I'll have to do it on my own. What shall I do? How do I bring this up with him?