Notice if your friend's actions and words don't align. If they frequently say one thing but do another, it could be a sign of insincerity or dishonesty.
Genuine friends show empathy and support when you're going through tough times. If your friend seems indifferent or unsupportive during your challenges, it may signal insincerity.
Pay attention to when your friend is available. If they only reach out when they need something or disappear when you need support, it may indicate they're not truly invested in the friendship.
Insincere friends often dominate conversations with their own concerns and rarely show interest in your life or experiences. If your conversations are consistently one-sided, it's worth addressing.
Trust is the foundation of sincere friendships. If your friend repeatedly breaches your trust, whether through gossip, betrayal, or broken promises, it's a significant red flag.