Please do what I wasn’t able to and run like Debc said. His behaviour will not change and the rage and anger once you’ve got a baby in your arms is super scary… terrifying even.
I have a nearly 4 year old with my addict and I’m still trying to get away. He has become a full-blown, daily addict now whereas before he was like your boyfriend… doing it once a week and we had the cycle you described. The anger and rage has only gotten worse. I fear for my life sometimes.
I hope you are able to leave him and protect yourself and your child.