I really need advice....

First, if there is any Navy wives or girlfriends here, I'd love to hear from you.

My boyfriend and I have been talking about getting married for sometime, he's ready to put a ring on the finger💜 he's always wanted to be in the Navy, and me being 33 weeks pregnant he's talked to me about moving with him for base housing & benefits. I'm extremely close with my family and I feel like they would completely disown me if I left. I'm not good with change. He has boot camp for two months, and then he says we'll be off. My question is, how do I talk to my family about all of this? Or how to prepare my self with all the changes that's going to happen??