It's not uncommon for some people to change aspects of their personality or behavior when they are trying to attract someone they are interested in. There could be several reasons for this behavior:
Desire for Acceptance: Your friend might believe that by changing her personality, she will be more likable or accepted by the person she is interested in. She might think that adopting certain traits or interests will make her more compatible with the guy and increase her chances of forming a romantic connection.
Insecurity: Insecurities about oneself or fear of rejection can lead people to alter their personalities in the hopes of being more appealing to others. They might think that their true self isn't enough, so they try to become someone they believe the other person would like better.
Peer Pressure: Sometimes, friends or society's expectations can influence someone to change their personality to fit in or conform to certain norms, including those related to dating and relationships.
Lack of Self-Awareness: Some people may not have a strong sense of self-awareness or have a clear understanding of their true personality. They might easily adapt to the preferences or interests of others, making it easier for them to change when trying to attract a specific person.
Infatuation and Over-Attachment: If your friend has developed strong feelings for this guy, she might become so infatuated or attached to him that she wants to become the type of person she thinks he desires.
It's essential to remember that changing one's entire personality to attract someone is not a healthy approach to forming a genuine and lasting relationship. It's crucial for individuals to be authentic and true to themselves. Pretending to be someone they are not can create issues in the long run as the other person may fall for an artificial version of them, leading to a lack of compatibility and trust in the relationship.
If you notice this behavior in your friend, it might be helpful to have an open and honest conversation with her. Encourage her to embrace her true self and be confident in who she is. True connections are formed when people appreciate and value each other's authentic selves.