I can't believe how good "Scenes From A Marriage" is. Made in 1973 by Ingmar Bergman, this six-episode Swedish TV series earned raves from everyone including Roger Ebert ("best of the year") and The New York Times. It was later transformed into a shorter movie but see the TV show for full impact. Libraries have it on DVD.
The ostensible subject is marriage but, more than that, it explores intimacy in relationships. Emotional, sexual and practical. Despite being made with almost no money the show entrances you by its deep writing and skillful acting (e.g., Liv Ullmann). It'll make you laugh and cry at the absurdity of human relations.