best self help books relationships

What are some other good books out about relationships?

I just finished reading Men are from Mars, Women are from Venus. I absolutely loved it.
It is a self-improvement book, and I plan to read a few others by that author.
I’m open for any suggestions. They do not have to be self-improvement.
They can be fiction or non-fiction.
I am a teenager, so I would rather nothing too complex.
Any good book that deal with relationships, preferably between a boyfriend and girlfriend

“I Kissed Dating Goodbye” by Joshua Harris (it’s a real fun read. Trust me!)

“Boy Meets Girl” by Joshua Harris

Salmansohn Brings Humor to the Self-Help World

The Love Guru (Single-Disc Edition) $6.36 In the comedy “The Love Guru,” Pitka (Mike Myers) is an American who was left at the gates of an ashram in India as a child and raised by gurus. He moves back to the U.S. to seek fame and fortune in the world of self-help and spirituality. His unorthodox methods are put to the test when he must settle a rift between Toronto Maple Leafs star hockey player Darren Roanoke (Romany Malco) and his estra…

Boundaries: When to Say Yes, How to Say No to Take Control of Your Life $5.95 Having clear boundaries is essential to a healthy, balanced lifestyle. A boundary is a personal property line that marks those things for which we are responsible. In other words, boundaries define wh…

Sheet Music: Uncovering the Secrets of Sexual Intimacy in Marriage $8.66 With his characteristic warmth and humor, Dr. Kevin Leman offers a practical guide to sex according to God’s plan. This frank and practical book is a perfect resource for married and engaged couple…