I found this book to be a bit outdated in some ways, specifically in its understanding of gender roles. However, Paramahansa Yogananda was a man before his time in many ways, and considering this was compiled from his talks in the 1940s, it's not a bad read. And the book deals with all types of relationships, not just romantic. The main idea being that your relationship with God is reflected through your relationships with all others in this realm.