Nobody said alienating anyone. "You need a new group of friends" doesn't mean OP can't still be friends with the people he already knows. But if they want to do

Nobody said alienating anyone. "You need a new group of friends" doesn't mean OP can't still be friends with the people he already knows. But if they want to do things that their current friend group just isn't interested in (Having fun without alcohol), then he needs to find new people to do that with.