And here's the academic megawork on this topic...
I would be remiss if I did not include the Cambridge Handbook on Personal Relationships among the "Related Resources." For those who want to check out the latest empirical research on interperonal communication in personal relationships, this is the thing to read. Plus, my own amazing advisor, Dr. Anita Vangelisti, is the work's chief editor. (Personal aside: Dr. Vangelisti is relatively famous in our field. I remember working up the nerve to ask if she'd take me on as an advisee. To her credit, she is the real deal and exudes the kind, humble, and thoughtful interpersonal communication she has made it her life's work to research. If you want to be floored by a litany of academic publications and achievements, check out her CV. I am honored to know her.)
"With the field of personal relationships having grown dramatically in the past quarter century, The Cambridge Handbook of Personal Relationships, Second Edition serves as a benchmark of the current state of scholarship, synthesizing the extant theoretical and empirical literature, tracing its historical roots, and making recommendations for future directions. Written by internationally known experts from key disciplines, the Handbook addresses both fundamental questions and cutting-edge concerns. This second edition has been thoroughly updated to reflect recent developments in analytical techniques, shifts in theoretical emphases, and an increased attention to social processes. New chapters include the Neuroscience of Salutary Close Relationships; Self-Disclosure in Relationships; Acceptance, Rejection, and the Quest for Relational Value; Relationships and Physical Health; Personal Relationships and Technology in the Digital Age; and Promoting Healthy Relationships. This compendium of state-of-the-art research and theory on personal relationships will be of great value to researchers, graduate students, and practitioners."
While I'm steering you toward great scholarship, I'd also like to mention a doctoral colleague of mine (and fellow advisee of Anita Vangelisti) whose work inspires me: Dr. Madeleine Redlick. You can check out her fascinating and timely publications here.