Borderline Personality Disorder or BPD, this diagnosis immediately rings alarms for many, typically with a high level of stigma and judgment. BPD traits are usually characterized by tumultuous interpersonal relationships, dramatic mood swings, and manipulative behaviors, including empty threats of self-harm.

Whether you're going on a third date or trying to maintain a marriage that's lasted decades, setting healthy boundaries is essential for a successful relationship. A partnership of any length will, of course, have its ups and downs, but proper boundaries ensure that neither party feels disrespected.