A reported 20% of adults in the U.S. experience signs and symptoms of poor mental health each year, according to a survey done by the National Alliance on Mental Illness (NAMI). Mental health and its impact on a relationship is often overlooked in the run-up to a wedding. However, a person living with poor mental health can have symptoms that they are struggling with and unknowingly exert that struggle over their partner throughout the wedding-planning process. Here's how to find a healthy balance when planning your wedding.