Fake Lyrics

Lyric discussion by zarinikus 

Cover art for Fake lyrics by Simply Red

As I understood and it is obvious from the song that she hurt him, that she has been changed and the reason is in something that happened in her youth, maybe someone broke her heart ...."You're hurting for love in so many ways" and then she changed and bacame fake, but he loves her anyway.

I did not get these lines "Turning your nose up At the clothes your girlfriend wears". What does that mean??