If your girlfriend is always happy around you but not around anyone else, it could indicate a couple of possibilities:
Comfort and Trust: It's possible that she feels very comfortable and secure in your presence. She may trust you deeply, which allows her to let her guard down and be her true self, resulting in a consistently happy and content demeanor when she's with you.
Emotional Connection: Your relationship may have a strong emotional connection, and being with you brings her joy and happiness. Your interactions and shared experiences could be contributing to her positive emotions when she's around you.
Social Anxiety: On the other hand, her reluctance to show happiness around others could be due to social anxiety or feeling uncomfortable in social settings. Some people feel more at ease and relaxed when they are with someone they are close to, but in larger groups or with people they don't know well, they may struggle to express happiness or feel self-conscious.
Masking Emotions: It's also possible that she's deliberately hiding her true feelings from others for various reasons. Some people find it challenging to be emotionally vulnerable or may have personal reasons for not expressing happiness openly in certain situations.
In any case, communication is vital in a relationship. If you notice this pattern and it concerns you, consider having an open and honest conversation with your girlfriend. Express your feelings and ask her how she's doing in different social situations. Creating a safe space for her to share her thoughts and emotions can help both of you understand each other better and strengthen your bond. Remember to be supportive and empathetic, as everyone has their unique way of expressing emotions based on their personality and life experiences.