There can be several reasons why someone may act differently when they are with you compared to when they are with their friends. Here are some common explanations for this behavior:
Comfort level: When people are with their close friends, they often feel more relaxed and at ease. They might let their guard down and show different aspects of their personality that they might not reveal in other situations.
Social dynamics: Each social group has its own dynamics and norms. Your friend might adapt his behavior to fit in better with his friends and the overall group vibe.
Desire for acceptance: Your friend might be trying to impress or gain acceptance from his friends, leading him to act differently in their presence.
Interest or attraction: Sometimes, if a person has romantic feelings or is interested in someone, they might act differently around that person compared to others.
Shared interests and activities: With friends, people often engage in shared interests or activities, which can influence their behavior and conversations.
Past experiences: Previous interactions and experiences with you or his friends might influence how he behaves around each group.
Personality adaptation: People may naturally adapt their behavior depending on the context and the people they are with. This doesn't necessarily mean they are being insincere; it's a common social phenomenon.
Peer pressure: In some cases, individuals might feel pressure to conform to certain behaviors or attitudes when they are with specific groups of friends.
It's important to understand that it's normal for people to act differently depending on the social context they are in. It doesn't necessarily mean that your friend is being disingenuous or insincere. People are complex, and their behavior can be influenced by various factors.
If you feel bothered or concerned about your friend's behavior, consider having an open and honest conversation with them. Communication can help you gain a better understanding of each other's perspectives and feelings. However, if the behavior is harmful or hurtful, it might be worth reevaluating the dynamics of the friendship and whether it aligns with your values and needs.