Sympathy is wearing thin for needy, demanding friend

DEAR ABBY: How can I set healthy boundaries with my best friend without feeling guilty? I have always been supportive and available because I sympathized with her difficult family dynamics during childhood and adulthood. She often talks to me about her problems with family and ever-changing relationships with men but rarely allows me or others to share their points of view or personal concerns. Saying “no” to her is challenging under any circumstance, and she demands that all focus be on her in social situations.