This is a very harmonious match, perhaps to a fault.  Two middles, being peacekeepers, may try to avoid conflict at any cost, leaving both feeling empty and unfulfilled. They need to regularly use their natural given mediation skills to communicate honestly with each other before bottled-up feelings create an insurmountable crisis.

If they both dare to be vulnerable and open up about their feelings, they can have a genuinely good relationship. Consistently expressing their appreciation for one another, doing thoughtful little gestures, and allowing for social ties outside of the relationship would be beneficial.