New friends

So my gf has started hanging around with new people and made some new friends but she's been really distant and cocky since she started talking to them. Im not getting funny about her having friends but shes really different now and its hard to talk to her because she's always preoccupied with them even when she's not actually with them. What do I do? Tell her? I don't want her to think she can't have friends but I don't like the new her ya know?