I've been in a similar situation when i go out for the night my my gf, she wants to go to one pub with her mates and i don't want to. She then gets annoyed with me when i don't want to go to this pub, but when i used to go she just ended up talking to all her mates from school, pretty much ignoring me . If i was you i'd simply tell her how you feel about her 'changing', trying to explain that you feel she's becoming what you don't like. If she doesn't want to go to your gigs and you're fine with that, then she should be ok that you don't wanna hang around with people you don't like.