There could be several reasons why your girlfriend might share with you that other people have complimented her attractiveness:
Seeking validation: Like anyone else, your girlfriend might enjoy receiving compliments and feel validated when others find her attractive. By sharing these compliments with you, she might be seeking additional reassurance and validation from someone she cares about and trusts.
Open communication: She could be trying to maintain open and honest communication in your relationship. Sharing compliments she receives might be her way of being transparent about her interactions with others, ensuring that there are no secrets between you.
Trust and confidence in your relationship: By sharing these compliments, your girlfriend might be demonstrating that she trusts you and is secure in your relationship. She may feel comfortable enough to discuss these matters with you without fear of judgment or jealousy.
Boosting your ego: She might be trying to make you feel good about yourself as well by indirectly highlighting that she's with someone who others find attractive.
Insecurity: On the other hand, it's also possible that she might be feeling insecure or uncertain about your feelings towards her. By sharing compliments she receives, she could be seeking reassurance that you still find her attractive and desirable.
Addressing potential jealousy: Sometimes, by sharing compliments openly, she may want to address any potential feelings of jealousy or possessiveness that might arise due to others complimenting her.
It's essential to approach these situations with understanding and empathy. If you're unsure about her intentions or if her sharing these compliments makes you uncomfortable, it's best to have an open and honest conversation with her. Communication is key in any relationship, and discussing your feelings and concerns can help build trust and strengthen your bond. Remember, everyone has different communication styles and motivations, so it's crucial to listen to each other and find common ground in your relationship.