Boyfriend won’t tell his parents

I’m 18 he’s 19 my whole family knows I’m pregnant and my friends, my boyfriend won’t tell his parents they were away on a trip for awhile and the been back a week maybe more and he still won’t tell them it’s making me frustrated because i don’t want to continue to hide my pregnancy from people it makes it seem like he’s just avoiding telling them because he hasn’t even tried to go there to talk to them and I’m not ashamed of my pregnancy I’m happy and he seemed like he was too but this thing + no one he knows knows I’m not sure what to do I just want to announce my pregnancy already 🤦🏻‍♀️