Relationship Problems

I’m 10 weeks pregnant and my partner and I have been through a lot together since we met. We lost a baby together and this is our rainbow. To put it simply he is the ideal man in every logical way. He’s a good provider, always will be. He’s good in bed and I trust him (I’ve been burned by infidelity in past relationships so that’s a big deal) My issue is I’m 27 and he is 30 and I am so over the partying lifestyle. When we lost our first baby, he said he was totally ready to try again and all he wanted was to be a family man. He said he would quit partying as I expressed to him that if we are going to try for another baby, we are going to grow up. So, I phased out of drinking with our friends except the odd camping trip, which is fine. I used to participate in rec drug use and I quit that too. I just don’t go around when that’s the scene. I’ve lost a lot of “friends” but I’m okay with it. He however, has not lived up to his promises. Over time I just watched every promise he made me amount to nothing, as he still focuses on drinking and playing loud music with his friends and is now even starting up a club business. Since he’s so business savvy he has sworn it’s just for profit, but I can see it already: an excuse to continue the lifestyle I am done with.

I’m so torn, because it feels like he got me pregnant again and then dropped our plan and he is banking on me not going anywhere because I’m obviously pregnant and vulnerable. What do I do? Cut him loose and do this thing alone?