why is my friend doing this

Hi I think I used to be quite a sociable person around 4 years ago when I started secondary,my best friend who is srill my best friend now, was not much of a sociable person at the time.Fast forward to now,we’re in year 11 and I believe shes become way more sociable and can make friends easily which makes me very happy and proud as she has progressed,but now I feel like I’m way less sociable and more avoidant,awkward and more on the quiet side,this isnt even the issue,the issue is my best friend loves to sort of shove in my face that the people we share mutuals with (like friends close to us but we don’t hang out with everyday) are much closer to her than me,and I understand that,I get that most mutuals have been in her class over these years so naturally she’ll be closer;what I don’t get,is why she needs to always bring it up in small instances??? Is there like a reason or?