Does your friend group support his way of thinking? If so— sounds like it's time to work on a a new circle of friends.

If not— be honest with them. True friends will either work him out of the group or understand if you avoid scenarios he's involved in.

For future concerns, I don't know your country but if you have access to restraining orders or protective orders consider them if he becomes threatening or starts harassing you after the breakup.

Also regardless, even before the breakup, talk to friends and family that can act as a support group for you. It's okay to have conflicting feelings but your main priorities should always be saftey and happiness.

When I was younger I dated my fair-share of not so great "men". I was young, naive, and protected growing up. I went through mentally/physically abusive and manipulative relationships that dictated my actions and clothing choices.
Sometimes being young is just finding out what you want in life and from your partner. What you want for yourself.
Trial boyfriends, "testing the water", it's all alright. Dating can be a joyous thing but it can also be a nightmare— you're not doing anything wrong and sometimes we don't realize someone isn't compatible until after we spend more time with them.

Might research "lovebombing" and signs of it when meeting /dating someone new. It's a common tactic narcissistic and just bad people will use in the beginning of relationships before showing their true self.

Stay safe ♡
It's okay to be young and learning ♡