AIO for cutting all ties?

There have never been red flags up until this point. He (25M) is a big part of my (19F) friend group. Am I being sensitive? I feel like he went too far. But if I cut all ties with him, it will really disrupt the group. I don’t want to bring it up to my friends because they might side with him and say I’m over reacting. But I don’t feel comfortable around him anymore.