If a friend is consistently rude to everyone except for her boyfriend, there could be several potential reasons for this behavior:
Comfort and Trust: She might feel more comfortable and trusting with her boyfriend, allowing her to let her guard down and be more authentic without fear of judgment.
Insecurity: Her rudeness towards others could be a way of boosting her self-esteem or feeling superior to others. Being nice to her boyfriend might make her feel loved and validated, which reduces the need to put on a defensive or rude facade.
Boundary Issues: It's possible that she has boundary issues or difficulty managing her emotions, leading to inconsistent behavior with different people.
Emotional Dependency: She might be emotionally dependent on her boyfriend and doesn't want to jeopardize the relationship by being rude.
Personal Issues: She might be going through personal problems or stress, and unfortunately, her way of coping is by taking it out on others.
Feeling Secure in the Relationship: She might feel secure in her relationship, which reduces the need to maintain a pleasing facade with her boyfriend.
Social Anxiety or Shyness: Some people are more reserved or anxious in social situations, leading to them coming across as rude or standoffish unintentionally.
Different Social Circles: It's possible that her boyfriend's social circle is more aligned with her personality and interests, leading to more positive interactions.
Regardless of the reasons behind her behavior, it's crucial to address the issue if her rudeness is causing discomfort or strain in your friendship. Approach the conversation with empathy and understanding, and try to express how her behavior makes you feel. If she values the friendship, she might be willing to reflect on her actions and work on improving her behavior. However, it's essential to remember that people's actions and attitudes are ultimately their responsibility, and you should prioritize your well-being and boundaries in any relationship.