Any suggestions of books, general advice, methods, etc. for spiritual or alternative methods to relationships/getting to know a partner?

No drug suggestions, please (I’ve been there, done that, don’t do that any longer)

I’ve just begun (about 3 months) a relationship with a woman who I can see a future with. We’ve spoken about perhaps taking a different approach at times, getting to know each other through different practices, switching it up in other ways we’ve run past relationships. Nothing is wrong, we are just open!

So I’m looking for suggestions. Of course it doesn’t have to be published advice, it can be simply personal. I know that relationships take time; they take shared experiences, ups, down, all that….

Thanks!