Does she really want to be friends with us?

theres this girl in my grade.her name is brooke.and shes like rele popular.lke maybe even leader.her moms a teacher and everything,n i always see her staring.my friends and i dont think of us as clique but every1 else does pretty much.we're fine with that 2!but then brooke came up 2 me(im leader of my group.did i say we just say we're a group??)and she was like,"hey laura,can i join your clique?"i was like,"ummmmm.....o....kay?"so i was thinking is she serious?she sat with us at lunch.follows me to the bathroom during bathroom breaks.gives me hugs.and lots more.what do u think?is she serious?can she BE serious about this??