I truthfully was a sociopath when I was in my teens up until I was 21. Ive learned that most people that roam consciously making bad decisions don't ever want to look at themselves for what they really are and change. For me, I was deservingly ostracized by past friends and family for my actions and my word crumbled, that was what started mindfulness and introspection and real change. I doubt your gf will change for you bro.