How do I know who's my good friend and who's my bad friend?

A good friend supports you, respects your boundaries, and brings positivity to your life, while a bad friend often drains your energy, disrespects your feelings, or exploits your trust. Pay attention to how you feel after spending time with them; if you feel uplifted and valued, they're likely a good friend. Conversely, if interactions leave you feeling anxious or unhappy, they may not have your best interests at heart. Trust your instincts and look for consistent patterns in their behavior.