We've had a case in our family where the couple was just not getting along and they decided to call it quits. At that point we asked them both to see the local Imam who is also a well educated happily married gentleman. They both met him separately, talked out their issues. What the Imam did was clarify some misconceptions on rights and responsibilities but he couldn't make either of them change their mind. Eventually at the time of divorce, the process was smooth because both parties knew what their Islamic rights were.
At the end of the day, I feel the willingness to change is what could help a relationship and third party intervention, be it family, friends or the Imam just help organize thoughts and perhaps facilitate communication...which is also necessary.
Totally.
Imams - it varies from person to person - can sometimes offer good advice according the situation. What Ive also noticed is that they are far more equipped to deal with issues regarding arranged marriages, joint family systems, religious instruction, etc.
So, I would go to our local Imam.