Asking for Advice with my Metalhead GF

My girlfriend absolutely LOVES metal, and she often recommends me metal songs. Only problem is that (A.) I have autism and wouldn't be able to ever attend a metal concert with her, and (B.) I genuinely dislike metal music. I don't know if I should explain to her that I'm not a huge metal fan, because I'm a yes man and whenever she recommends me a song, I respond like it was the tears of Jesus being played through a golden flute. I'm also scared that considering that metal music is a huge personality trait of hers, if I told her I wasn't a fan she'd take it personally, or worse, try to suppress that part of herself, which I would never want her to do. Does anyone have any advice, sorry?