Heather was someone who loved to be on stage, and she sought any attention she could get. She was seductive and manipulative to others in her life, even though she was insecure in her relationships. What personality disorder diagnosis does Heather's symptoms MOST likely match?

Borderline personality disorder.

Explanation:

It is borderline personality disorder because a borderline personality disorder is a mental disorder that is characterized by insecurity, unstable moods, relationships and manipulation behaviors. The major symptoms are feelings if insecurity, emotional instability, disrupted social relationships.

Treatment if this include talk therapy like cognitive therapy,medication and admission into the hospital if the condition is severe.