My bf is obsessed with his friends

All my bf wants to do is hang out w his friends , chill with his friends if I want to do something before agreeing he asks me if I want to chill with his friends and I addressed it how he acts like his friends are his lovers and his response was “ Oh well they been here before you “ like .... okay every time I talk about someone he always say they been here before you or I knew her before you or this was before you like got damn okay . It doesn’t matter if you knew your friends before me I’m here now if that’s the case he can have sex with his friends and be in a whole damn relationship with them. That’s such a turn off omg 🤦‍♀️🤦‍♀️I hate a guy who’s all about his friends.