BuddyPress.org

I would like to make some pages on my site available only for members who register and login using BuddyPress. Currently, these individual pages are password protected. This is difficult for users because they must remember a password for protected pages, as well as their username and password to get to BuddyPress features. I would prefer not to work in the code. If changes in the code are necessary, will I have to redo the code if our theme changes? It is important that only registered and logged-in users see the contents of the protected pages – would not want this to “break” without my knowing; for example, would not want the contents to suddenly become available by Google search. I am using BuddyPress 3.2.0 and WP 4.9.8. Thanks.