Leaving a friend group that treats you badly feels like jumping off a boat. Turns out you can swim.

Staying in a group that treats you badly often has little to do with liking them. It has to do with what you believe is waiting if you let go: nothing, nobody, lunch alone until graduation. The water looks much deeper from the deck than it turns out to be. Most people who leave find they had already been doing the hardest kind of alone, with company around them.

You do not need to announce anything. Say yes to other people, say no to one plan a week, and let distance do the quiet part.