If you begin hitting a wall with a hammer, it takes a while before you get to see the objects on the other side of the wall...
Tinnitus Talk Support Forum
There is nothing to feel jealous about especially when someone does something stupid, as going to concerts without taking precautions due to ignorance. I assure you, if your GF subjects her hearing to high levels of sound she will eventually get tinnitus. She probably has it already but it's at a very low volume so don't be fooled, especially if she uses headphones. Believe me, I know what I'm talking about!