Low my opion thanks ( I could be wrong )
Because they are either ignorent and do not understand what they are doing or they do not see theirs lives as wonderful, they are trying to escape something that is going on that they do not want to deal with
I'm going to answer this based on context, so it may not be accurate, but it's how I feel.
Eduardo doesn't communicate with his partner. He gets frustrated. Then he's filled with resentment. His partner is unaware. The relationship most likely won't be good from this point unless Eduardo learns to communicate with his partner. Otherwise, the relationship will most likely be out the window in a while.
Hope that helped! :)
Have a good day! :)
DISCLAIMER: ALWAYS. Heck with a reliable source!