Am I in the wrong for telling my boyfriend to make one of his girl friends to stop saying she loves him?

Anonymous

Me and my boyfriend met through friends so far it’s been a wonderful experience no problems so far. Only a few common ones like this one, there is this girl in our groupchat we are in with randoms he doesn’t talk to her as much, she knows he has a girlfriend aka me but she keeps telling him “love you good night” or “have a nice day love you stay safe” this obviously made me mad because she knows he’s in a relationship and still is saying “I love you” to a taken man? He doesn’t say I love you back to her thankfully. She also sends some kissing emoticons like this: ( ˘ ³˘
when she knows he is taken my boyfriend calls her sister or sis and she does call him brother and it’s fine with me but sometimes she sends stickers to him that says “Goodmorning sunshine” with hearts around it in the group chat. I don’t know if im in the wrong but I told my boyfriend to make her stop. My boyfriend told me he will but I will feel bad if I’m just overreacting?

Am I in the wrong for telling my boyfriend to make one of his girl friends to stop saying she loves him?
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