Communication, communication, communication. If you don’t do it now I guarantee it won’t come later. There’s a lot you haven’t told us about him. Is he the lazy type ? Is he busy taking care of other issues regarding your move ?
The main concern I have is that he , ( and men naturally do this ) , is getting second thoughts or cold feet about this major commitment coming up.
Ill tell you one thing from experience. Living with someone is way different than
just knowing each other on the outside living separately .
Good luck !