Dream Meaning Infidelity

What does this mean?
My boyfrien woke up this morning feeling terrible about his dream the dream that had relations sex with his wife, best friends, and that his friend found out. He awoke with a feeling of depression that this friend is like his brother. Both are very good friends us. Besides, my boyfriend (living together), and I are going through some problems, it has nothing to do with infidelity, which are quite honest and respect each other. our problem is more like he thinks hes not really in love and we will probably move out.
Not really sure you can always check www.dreammoods.com
BSHARP: WOYZECK AUGUST 5-29 by Netta Yashchin