Is your relationship on the rocks? Are you wondering what mistake you might be making and how to avoid repeating it in the future? If so, help is on the way.

In this video, relationship coach and YourTango Expert Dr. Bruce Derman and his wife, certified professional coach Marla Gorlick, explain the biggest mistake that people make in relationships. "Being in a long-term, committed relationship is extremely challenging," Derman says. "It asks you to face — and come to agreement on — thousands and thousands of agreements."

Want to learn how to connect better with your partner? Check out the video above!

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